212106574557220 has 48 divisors (see below), whose sum is σ = 509056719171840. Its totient is φ = 72722119814784.

The previous prime is 212106574556917. The next prime is 212106574557223. The reversal of 212106574557220 is 22755475601212.

It is not an unprimeable number, because it can be changed into a prime (212106574557223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101710842 + ... + 103775278.

It is an arithmetic number, because the mean of its divisors is an integer number (10605348316080).

Almost surely, 2^{212106574557220} is an apocalyptic number.

212106574557220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212106574557220 is an abundant number, since it is smaller than the sum of its proper divisors (296950144614620).

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

212106574557220 is a wasteful number, since it uses less digits than its factorization.

212106574557220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798332 (or 2798330 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 212106574557220 in words is "two hundred twelve trillion, one hundred six billion, five hundred seventy-four million, five hundred fifty-seven thousand, two hundred twenty".