Search a number
BaseRepresentation
bin10011100100010011…
…001101101011100010
32000020020020020022202
4103210103031223202
5321012042024302
613352451333202
71342435666343
oct234423155342
960206206282
1021010111202
118a01729573
1240a42b1202
131c9aa45182
1410345060ca
1582e798202
hex4e44cdae2

21010111202 has 4 divisors (see below), whose sum is σ = 31515166806. Its totient is φ = 10505055600.

The previous prime is 21010111201. The next prime is 21010111207. The reversal of 21010111202 is 20211101012.

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

It can be written as a sum of positive squares in only one way, i.e., 19440446041 + 1569665161 = 139429^2 + 39619^2 .

It is not an unprimeable number, because it can be changed into a prime (21010111201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252527799 + ... + 5252527802.

Almost surely, 221010111202 is an apocalyptic number.

21010111202 is a deficient number, since it is larger than the sum of its proper divisors (10505055604).

21010111202 is a wasteful number, since it uses less digits than its factorization.

21010111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505055603.

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

Adding to 21010111202 its reverse (20211101012), we get a palindrome (41221212214).

The spelling of 21010111202 in words is "twenty-one billion, ten million, one hundred eleven thousand, two hundred two".

Divisors: 1 2 10505055601 21010111202