212211102211220 has 96 divisors (see below), whose sum is σ = 527227128852480. Its totient is φ = 70201434401280.

The previous prime is 212211102211187. The next prime is 212211102211271. The reversal of 212211102211220 is 22112201112212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212211102211192 and 212211102211201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11794139 + ... + 23738658.

It is an arithmetic number, because the mean of its divisors is an integer number (5491949258880).

Almost surely, 2^{212211102211220} is an apocalyptic number.

212211102211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211102211220 is an abundant number, since it is smaller than the sum of its proper divisors (315016026641260).

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

212211102211220 is a wasteful number, since it uses less digits than its factorization.

212211102211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35534313 (or 35534311 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212211102211220 its reverse (22112201112212), we get a palindrome (234323303323432).

The spelling of 212211102211220 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred two million, two hundred eleven thousand, two hundred twenty".