2101111201220 has 12 divisors (see below), whose sum is σ = 4412333522604. Its totient is φ = 840444480480.

The previous prime is 2101111201199. The next prime is 2101111201237. The reversal of 2101111201220 is 221021111012.

It can be written as a sum of positive squares in 2 ways, for example, as 1624702031044 + 476409170176 = 1274638^2 + 690224^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101111201195 and 2101111201204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52527780011 + ... + 52527780050.

It is an arithmetic number, because the mean of its divisors is an integer number (367694460217).

Almost surely, 2^{2101111201220} is an apocalyptic number.

2101111201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101111201220 is an abundant number, since it is smaller than the sum of its proper divisors (2311222321384).

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

2101111201220 is a wasteful number, since it uses less digits than its factorization.

2101111201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105055560070 (or 105055560068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101111201220 its reverse (221021111012), we get a palindrome (2322132312232).

The spelling of 2101111201220 in words is "two trillion, one hundred one billion, one hundred eleven million, two hundred one thousand, two hundred twenty".