200121100011 has 64 divisors (see below), whose sum is σ = 342836674560. Its totient is φ = 113009541120.

The previous prime is 200121100007. The next prime is 200121100027. The reversal of 200121100011 is 110001121002.

It is a happy number.

It is not a de Polignac number, because 200121100011 - 2² = 200121100007 is a prime.

It is a super-2 number, since 2×200121100011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200121099966 and 200121100002.

It is not an unprimeable number, because it can be changed into a prime (200121100411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6152551 + ... + 6184991.

It is an arithmetic number, because the mean of its divisors is an integer number (5356823040).

Almost surely, 2^200121100011 is an apocalyptic number.

200121100011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

200121100011 is a deficient number, since it is larger than the sum of its proper divisors (142715574549).

200121100011 is a wasteful number, since it uses less digits than its factorization.

200121100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32841 (or 32835 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200121100011 its reverse (110001121002), we get a palindrome (310122221013).

The spelling of 200121100011 in words is "two hundred billion, one hundred twenty-one million, one hundred thousand, eleven".