2101122111220 has 96 divisors (see below), whose sum is σ = 5017950508032. Its totient is φ = 732076800000.

The previous prime is 2101122111217. The next prime is 2101122111227. The reversal of 2101122111220 is 221112211012.

It is a junction number, because it is equal to n+sod(n) for n = 2101122111194 and 2101122111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101122111227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836341 + ... + 2213980.

It is an arithmetic number, because the mean of its divisors is an integer number (52270317792).

Almost surely, 2^{2101122111220} is an apocalyptic number.

2101122111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101122111220 is an abundant number, since it is smaller than the sum of its proper divisors (2916828396812).

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

2101122111220 is a wasteful number, since it uses less digits than its factorization.

2101122111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050473 (or 3050471 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2101122111220 its reverse (221112211012), we get a palindrome (2322234322232).

The spelling of 2101122111220 in words is "two trillion, one hundred one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty".