2031031112220 has 144 divisors (see below), whose sum is σ = 6847675746912. Its totient is φ = 483081131520.

The previous prime is 2031031112207. The next prime is 2031031112221. The reversal of 2031031112220 is 222111301302.

2031031112220 is a `hidden beast` number, since 2 + 0 + 310 + 311 + 1 + 22 + 20 = 666.

It is a super-2 number, since 2×2031031112220² (a number of 25 digits) contains 22 as substring.

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 = 2031031112193 and 2031031112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031031112221) 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, 9572167 + ... + 9782046.

It is an arithmetic number, because the mean of its divisors is an integer number (47553303798).

Almost surely, 2^{2031031112220} is an apocalyptic number.

2031031112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031031112220 is an abundant number, since it is smaller than the sum of its proper divisors (4816644634692).

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

2031031112220 is a wasteful number, since it uses less digits than its factorization.

2031031112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19354292 (or 19354287 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2031031112220 its reverse (222111301302), we get a palindrome (2253142413522).

The spelling of 2031031112220 in words is "two trillion, thirty-one billion, thirty-one million, one hundred twelve thousand, two hundred twenty".