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200121002111 = 386395179249
BaseRepresentation
bin1011101001100000100…
…1000010100001111111
3201010112202222020012002
42322120021002201333
511234321434031421
6231533451332515
720313120310562
oct2723011024177
9633482866162
10200121002111
11779640a7948
123295015113b
1315b43407264
1499861bc4d9
155313dc6b0b
hex2e9824287f

200121002111 has 4 divisors (see below), whose sum is σ = 200126220000. Its totient is φ = 200115784224.

The previous prime is 200121002087. The next prime is 200121002129. The reversal of 200121002111 is 111200121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-200121002111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121002092 and 200121002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121002311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550986 + ... + 2628263.

It is an arithmetic number, because the mean of its divisors is an integer number (50031555000).

Almost surely, 2200121002111 is an apocalyptic number.

200121002111 is a deficient number, since it is larger than the sum of its proper divisors (5217889).

200121002111 is an equidigital number, since it uses as much as digits as its factorization.

200121002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217888.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121002111 its reverse (111200121002), we get a palindrome (311321123113).

It can be divided in two parts, 200121002 and 111, that multiplied together give a palindrome (22213431222).

The spelling of 200121002111 in words is "two hundred billion, one hundred twenty-one million, two thousand, one hundred eleven".

Divisors: 1 38639 5179249 200121002111