210121230112 has 12 divisors (see below), whose sum is σ = 413676171846. Its totient is φ = 105060615040.

The previous prime is 210121230101. The next prime is 210121230139. The reversal of 210121230112 is 211032121012.

It can be written as a sum of positive squares in only one way, i.e., 113248402576 + 96872827536 = 336524^2 + 311244^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283144189 + ... + 3283144252.

Almost surely, 2^210121230112 is an apocalyptic number.

It is an amenable number.

210121230112 is a deficient number, since it is larger than the sum of its proper divisors (203554941734).

210121230112 is an equidigital number, since it uses as much as digits as its factorization.

210121230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566288451 (or 6566288443 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 210121230112 its reverse (211032121012), we get a palindrome (421153351124).

The spelling of 210121230112 in words is "two hundred ten billion, one hundred twenty-one million, two hundred thirty thousand, one hundred twelve".