210121201012 has 12 divisors (see below), whose sum is σ = 367716303360. Its totient is φ = 105059400056.

The previous prime is 210121201007. The next prime is 210121201057. The reversal of 210121201012 is 210102121012.

It is a super-2 number, since 2×210121201012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210121200983 and 210121201001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178539 + ... + 672397.

It is an arithmetic number, because the mean of its divisors is an integer number (30643025280).

Almost surely, 2^210121201012 is an apocalyptic number.

It is an amenable number.

210121201012 is a deficient number, since it is larger than the sum of its proper divisors (157595102348).

210121201012 is a wasteful number, since it uses less digits than its factorization.

210121201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600230 (or 600228 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210121201012 its reverse (210102121012), we get a palindrome (420223322024).

The spelling of 210121201012 in words is "two hundred ten billion, one hundred twenty-one million, two hundred one thousand, twelve".