211211221102020 has 72 divisors (see below), whose sum is σ = 642045930611904. Its totient is φ = 56202386292288.

The previous prime is 211211221101971. The next prime is 211211221102087. The reversal of 211211221102020 is 20201122112112.

211211221102020 is a `hidden beast` number, since 21 + 1 + 211 + 221 + 10 + 202 + 0 = 666.

It is a super-2 number, since 2×211211221102020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211211221101984 and 211211221102002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1256228224 + ... + 1256396343.

It is an arithmetic number, because the mean of its divisors is an integer number (8917304591832).

Almost surely, 2^{211211221102020} is an apocalyptic number.

211211221102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211211221102020 is an abundant number, since it is smaller than the sum of its proper divisors (430834709509884).

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

211211221102020 is a wasteful number, since it uses less digits than its factorization.

211211221102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512625049 (or 2512625044 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211211221102020 its reverse (20201122112112), we get a palindrome (231412343214132).

The spelling of 211211221102020 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-one million, one hundred two thousand, twenty".