210121111201212 has 36 divisors (see below), whose sum is σ = 531140267494200. Its totient is φ = 70040265966432.

The previous prime is 210121111201201. The next prime is 210121111201223. The reversal of 210121111201212 is 212102111121012.

It is a happy number.

210121111201212 is a `hidden beast` number, since 21 + 0 + 121 + 111 + 201 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (210121111201201) and next prime (210121111201223).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22376914 + ... + 30347462.

Almost surely, 2^{210121111201212} is an apocalyptic number.

It is an amenable number.

210121111201212 is an abundant number, since it is smaller than the sum of its proper divisors (321019156292988).

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

210121111201212 is a wasteful number, since it uses less digits than its factorization.

210121111201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8702842 (or 8702837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 210121111201212 its reverse (212102111121012), we get a palindrome (422223222322224).

The spelling of 210121111201212 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred eleven million, two hundred one thousand, two hundred twelve".