210111122011212 has 144 divisors (see below), whose sum is σ = 546134793745632. Its totient is φ = 68060954142720.

The previous prime is 210111122011073. The next prime is 210111122011237. The reversal of 210111122011212 is 212110221111012.

It is a happy number.

210111122011212 is a `hidden beast` number, since 210 + 1 + 1 + 11 + 220 + 11 + 212 = 666.

210111122011212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11369025012 + ... + 11369043492.

Almost surely, 2^{210111122011212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210111122011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273067396872816).

210111122011212 is an abundant number, since it is smaller than the sum of its proper divisors (336023671734420).

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

210111122011212 is a wasteful number, since it uses less digits than its factorization.

210111122011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28488 (or 28483 counting only the distinct ones).

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

Adding to 210111122011212 its reverse (212110221111012), we get a palindrome (422221343122224).

The spelling of 210111122011212 in words is "two hundred ten trillion, one hundred eleven billion, one hundred twenty-two million, eleven thousand, two hundred twelve".