2031111020 has 48 divisors (see below), whose sum is σ = 4594275840. Its totient is φ = 751778496.

The previous prime is 2031111007. The next prime is 2031111029. The reversal of 2031111020 is 201111302.

It is a junction number, because it is equal to n+sod(n) for n = 2031110992 and 2031111010.

It is not an unprimeable number, because it can be changed into a prime (2031111029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45812 + ... + 78491.

It is an arithmetic number, because the mean of its divisors is an integer number (95714080).

Almost surely, 2^2031111020 is an apocalyptic number.

2031111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031111020 is an abundant number, since it is smaller than the sum of its proper divisors (2563164820).

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

2031111020 is a wasteful number, since it uses less digits than its factorization.

2031111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124374 (or 124372 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2031111020 is about 45067.8490722599. The cubic root of 2031111020 is about 1266.4203702408.

Adding to 2031111020 its reverse (201111302), we get a palindrome (2232222322).

The spelling of 2031111020 in words is "two billion, thirty-one million, one hundred eleven thousand, twenty".