211221202220120 has 32 divisors (see below), whose sum is σ = 479607775693200. Its totient is φ = 83713357208448.

The previous prime is 211221202220099. The next prime is 211221202220123. The reversal of 211221202220120 is 21022202122112.

It is a super-2 number, since 2×211221202220120² (a number of 29 digits) contains 22 as substring.

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 = 211221202220092 and 211221202220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221202220123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24222610574 + ... + 24222619293.

Almost surely, 2^{211221202220120} is an apocalyptic number.

211221202220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221202220120 is an abundant number, since it is smaller than the sum of its proper divisors (268386573473080).

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

211221202220120 is a wasteful number, since it uses less digits than its factorization.

211221202220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48445229987 (or 48445229983 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211221202220120 its reverse (21022202122112), we get a palindrome (232243404342232).

The spelling of 211221202220120 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred two million, two hundred twenty thousand, one hundred twenty".