2031401111220 has 144 divisors (see below), whose sum is σ = 6864735018960. Its totient is φ = 482794518528.

The previous prime is 2031401111219. The next prime is 2031401111227. The reversal of 2031401111220 is 221111041302.

2031401111220 is a `hidden beast` number, since 2 + 0 + 31 + 401 + 1 + 11 + 220 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 620042855184 + 1411358256036 = 787428^2 + 1188006^2 .

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 = 2031401111193 and 2031401111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031401111227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14899729 + ... + 15035448.

It is an arithmetic number, because the mean of its divisors is an integer number (47671770965).

Almost surely, 2^{2031401111220} is an apocalyptic number.

2031401111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031401111220 is an abundant number, since it is smaller than the sum of its proper divisors (4833333907740).

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

2031401111220 is a wasteful number, since it uses less digits than its factorization.

2031401111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29935234 (or 29935229 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2031401111220 its reverse (221111041302), we get a palindrome (2252512152522).

The spelling of 2031401111220 in words is "two trillion, thirty-one billion, four hundred one million, one hundred eleven thousand, two hundred twenty".