212101112100220 has 48 divisors (see below), whose sum is σ = 511855059538368. Its totient is φ = 72318611220480.

The previous prime is 212101112100217. The next prime is 212101112100313. The reversal of 212101112100220 is 22001211101212.

It is a junction number, because it is equal to n+sod(n) for n = 212101112100194 and 212101112100203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4185079477 + ... + 4185130156.

It is an arithmetic number, because the mean of its divisors is an integer number (10663647073716).

Almost surely, 2^{212101112100220} is an apocalyptic number.

212101112100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101112100220 is an abundant number, since it is smaller than the sum of its proper divisors (299753947438148).

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

212101112100220 is a wasteful number, since it uses less digits than its factorization.

212101112100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8370209830 (or 8370209828 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212101112100220 its reverse (22001211101212), we get a palindrome (234102323201432).

The spelling of 212101112100220 in words is "two hundred twelve trillion, one hundred one billion, one hundred twelve million, one hundred thousand, two hundred twenty".