211220201132220 has 96 divisors (see below), whose sum is σ = 715663740331008. Its totient is φ = 45438967636992.

The previous prime is 211220201132219. The next prime is 211220201132233. The reversal of 211220201132220 is 22231102022112.

It is a super-2 number, since 2×211220201132220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 14791323472 + ... + 14791337751.

It is an arithmetic number, because the mean of its divisors is an integer number (7454830628448).

Almost surely, 2^{211220201132220} is an apocalyptic number.

211220201132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220201132220 is an abundant number, since it is smaller than the sum of its proper divisors (504443539198788).

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

211220201132220 is a wasteful number, since it uses less digits than its factorization.

211220201132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29582661259 (or 29582661257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211220201132220 its reverse (22231102022112), we get a palindrome (233451303154332).

The spelling of 211220201132220 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred one million, one hundred thirty-two thousand, two hundred twenty".