20021211211122 has 48 divisors (see below), whose sum is σ = 47323863595008. Its totient is φ = 6066905401440.

The previous prime is 20021211211097. The next prime is 20021211211187. The reversal of 20021211211122 is 22111211212002.

20021211211122 is a `hidden beast` number, since 200 + 21 + 211 + 211 + 1 + 22 = 666.

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 = 20021211211095 and 20021211211104.

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, 8534868 + ... + 10624800.

It is an arithmetic number, because the mean of its divisors is an integer number (985913824896).

Almost surely, 2^{20021211211122} is an apocalyptic number.

20021211211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021211211122 is an abundant number, since it is smaller than the sum of its proper divisors (27302652383886).

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

20021211211122 is a wasteful number, since it uses less digits than its factorization.

20021211211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138335 (or 2138332 counting only the distinct ones).

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

Adding to 20021211211122 its reverse (22111211212002), we get a palindrome (42132422423124).

The spelling of 20021211211122 in words is "twenty trillion, twenty-one billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-two".