210121001220112 has 40 divisors (see below), whose sum is σ = 422442222538752. Its totient is φ = 101139140889600.

The previous prime is 210121001220029. The next prime is 210121001220113. The reversal of 210121001220112 is 211022100121012.

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

It is not an unprimeable number, because it can be changed into a prime (210121001220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108887073 + ... + 1109076544.

Almost surely, 2^{210121001220112} is an apocalyptic number.

It is an amenable number.

210121001220112 is an abundant number, since it is smaller than the sum of its proper divisors (212321221318640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121001220112 is a wasteful number, since it uses less digits than its factorization.

210121001220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217963847 (or 2217963841 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210121001220112 its reverse (211022100121012), we get a palindrome (421143101341124).

The spelling of 210121001220112 in words is "two hundred ten trillion, one hundred twenty-one billion, one million, two hundred twenty thousand, one hundred twelve".