211229420931 has 12 divisors (see below), whose sum is σ = 308071389808. Its totient is φ = 139452432624.

The previous prime is 211229420893. The next prime is 211229420939. The reversal of 211229420931 is 139024922112.

211229420931 is a `hidden beast` number, since 2 + 1 + 1 + 229 + 420 + 9 + 3 + 1 = 666.

It is not a de Polignac number, because 211229420931 - 2¹⁹ = 211228896643 is a prime.

It is a super-2 number, since 2×211229420931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211229420939) 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, 113930800 + ... + 113932653.

Almost surely, 2^211229420931 is an apocalyptic number.

211229420931 is a deficient number, since it is larger than the sum of its proper divisors (96841968877).

211229420931 is a wasteful number, since it uses less digits than its factorization.

211229420931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227863562 (or 227863559 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 211229420931 in words is "two hundred eleven billion, two hundred twenty-nine million, four hundred twenty thousand, nine hundred thirty-one".