211012221492 has 36 divisors (see below), whose sum is σ = 533412499620. Its totient is φ = 70334704512.

The previous prime is 211012221491. The next prime is 211012221503. The reversal of 211012221492 is 294122210112.

211012221492 is a `hidden beast` number, since 21 + 10 + 122 + 21 + 492 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 122049614736 + 88962606756 = 349356^2 + 298266^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012221491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 983448 + ... + 1178640.

Almost surely, 2^211012221492 is an apocalyptic number.

It is an amenable number.

211012221492 is an abundant number, since it is smaller than the sum of its proper divisors (322400278128).

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

211012221492 is a wasteful number, since it uses less digits than its factorization.

211012221492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225232 (or 225227 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 211012221492 in words is "two hundred eleven billion, twelve million, two hundred twenty-one thousand, four hundred ninety-two".