211211122222020 has 48 divisors (see below), whose sum is σ = 591992761046400. Its totient is φ = 56265668894976.

The previous prime is 211211122222003. The next prime is 211211122222027. The reversal of 211211122222020 is 20222221112112.

It is a super-2 number, since 2×211211122222020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211122222027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1790472745 + ... + 1790590704.

It is an arithmetic number, because the mean of its divisors is an integer number (12333182521800).

Almost surely, 2^{211211122222020} is an apocalyptic number.

211211122222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211211122222020 is an abundant number, since it is smaller than the sum of its proper divisors (380781638824380).

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

211211122222020 is a wasteful number, since it uses less digits than its factorization.

211211122222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581064444 (or 3581064442 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211211122222020 its reverse (20222221112112), we get a palindrome (231433343334132).

The spelling of 211211122222020 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty".