211121102211012 has 72 divisors (see below), whose sum is σ = 610694417825856. Its totient is φ = 60242280819264.

The previous prime is 211121102211011. The next prime is 211121102211013. The reversal of 211121102211012 is 210112201121112.

It is a happy number.

211121102211012 is a `hidden beast` number, since 211 + 1 + 211 + 0 + 221 + 10 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (211121102211011) and next prime (211121102211013).

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

It is not an unprimeable number, because it can be changed into a prime (211121102211011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541708278 + ... + 542097869.

It is an arithmetic number, because the mean of its divisors is an integer number (8481866914248).

Almost surely, 2^{211121102211012} is an apocalyptic number.

It is an amenable number.

211121102211012 is an abundant number, since it is smaller than the sum of its proper divisors (399573315614844).

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

211121102211012 is a wasteful number, since it uses less digits than its factorization.

211121102211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083806937 (or 1083806932 counting only the distinct ones).

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

Adding to 211121102211012 its reverse (210112201121112), we get a palindrome (421233303332124).

The spelling of 211121102211012 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred two million, two hundred eleven thousand, twelve".