2101220431120 has 20 divisors (see below), whose sum is σ = 4885337502540. Its totient is φ = 840488172416.

The previous prime is 2101220431073. The next prime is 2101220431129. The reversal of 2101220431120 is 211340221012.

It can be written as a sum of positive squares in 2 ways, for example, as 679707909136 + 1421512521984 = 824444^2 + 1192272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2101220431120² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101220431129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13132627615 + ... + 13132627774.

It is an arithmetic number, because the mean of its divisors is an integer number (244266875127).

Almost surely, 2^{2101220431120} is an apocalyptic number.

2101220431120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101220431120 is an abundant number, since it is smaller than the sum of its proper divisors (2784117071420).

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

2101220431120 is a wasteful number, since it uses less digits than its factorization.

2101220431120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26265255402 (or 26265255396 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2101220431120 its reverse (211340221012), we get a palindrome (2312560652132).

The spelling of 2101220431120 in words is "two trillion, one hundred one billion, two hundred twenty million, four hundred thirty-one thousand, one hundred twenty".