211431204028 has 12 divisors (see below), whose sum is σ = 403641389592. Its totient is φ = 96105092720.

The previous prime is 211431204007. The next prime is 211431204097. The reversal of 211431204028 is 820402134112.

It is a junction number, because it is equal to n+sod(n) for n = 211431203987 and 211431204005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402627275 + ... + 2402627362.

It is an arithmetic number, because the mean of its divisors is an integer number (33636782466).

Almost surely, 2^211431204028 is an apocalyptic number.

It is an amenable number.

211431204028 is a deficient number, since it is larger than the sum of its proper divisors (192210185564).

211431204028 is a wasteful number, since it uses less digits than its factorization.

211431204028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805254652 (or 4805254650 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 211431204028 in words is "two hundred eleven billion, four hundred thirty-one million, two hundred four thousand, twenty-eight".