210011000121 has 96 divisors (see below), whose sum is σ = 346901947392. Its totient is φ = 121509642240.

The previous prime is 210011000117. The next prime is 210011000123. The reversal of 210011000121 is 121000110012.

It is a happy number.

It is not a de Polignac number, because 210011000121 - 2² = 210011000117 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (210011000123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30096985 + ... + 30103961.

It is an arithmetic number, because the mean of its divisors is an integer number (3613561952).

Almost surely, 2^210011000121 is an apocalyptic number.

It is an amenable number.

210011000121 is a deficient number, since it is larger than the sum of its proper divisors (136890947271).

210011000121 is a wasteful number, since it uses less digits than its factorization.

210011000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7263 (or 7260 counting only the distinct ones).

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

Adding to 210011000121 its reverse (121000110012), we get a palindrome (331011110133).

The spelling of 210011000121 in words is "two hundred ten billion, eleven million, one hundred twenty-one", and thus it is an aban number.