212177958420 has 24 divisors (see below), whose sum is σ = 594098283744. Its totient is φ = 56580788896.

The previous prime is 212177958413. The next prime is 212177958427. The reversal of 212177958420 is 24859771212.

It is an interprime number because it is at equal distance from previous prime (212177958413) and next prime (212177958427).

It is a self number, because there is not a number n which added to its sum of digits gives 212177958420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212177958427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768149594 + ... + 1768149713.

It is an arithmetic number, because the mean of its divisors is an integer number (24754095156).

Almost surely, 2^212177958420 is an apocalyptic number.

212177958420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212177958420 is an abundant number, since it is smaller than the sum of its proper divisors (381920325324).

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

212177958420 is a wasteful number, since it uses less digits than its factorization.

212177958420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536299319 (or 3536299317 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 212177958420 in words is "two hundred twelve billion, one hundred seventy-seven million, nine hundred fifty-eight thousand, four hundred twenty".