212021120220 has 96 divisors (see below), whose sum is σ = 730657417728. Its totient is φ = 44734125312.

The previous prime is 212021120093. The next prime is 212021120249. The reversal of 212021120220 is 22021120212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212021120220.

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, 19410394 + ... + 19421313.

It is an arithmetic number, because the mean of its divisors is an integer number (7611014768).

Almost surely, 2^212021120220 is an apocalyptic number.

212021120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021120220 is an abundant number, since it is smaller than the sum of its proper divisors (518636297508).

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

212021120220 is a wasteful number, since it uses less digits than its factorization.

212021120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38831739 (or 38831737 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212021120220 its reverse (22021120212), we get a palindrome (234042240432).

The spelling of 212021120220 in words is "two hundred twelve billion, twenty-one million, one hundred twenty thousand, two hundred twenty".