212131220504 has 32 divisors (see below), whose sum is σ = 454584093600. Its totient is φ = 90909941760.

The previous prime is 212131220467. The next prime is 212131220551. The reversal of 212131220504 is 405022131212.

It is a self number, because there is not a number n which added to its sum of digits gives 212131220504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1904792 + ... + 2013080.

It is an arithmetic number, because the mean of its divisors is an integer number (14205752925).

Almost surely, 2^212131220504 is an apocalyptic number.

It is an amenable number.

212131220504 is an abundant number, since it is smaller than the sum of its proper divisors (242452873096).

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

212131220504 is a wasteful number, since it uses less digits than its factorization.

212131220504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143283 (or 143279 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 212131220504 its reverse (405022131212), we get a palindrome (617153351716).

The spelling of 212131220504 in words is "two hundred twelve billion, one hundred thirty-one million, two hundred twenty thousand, five hundred four".