221031130122 has 48 divisors (see below), whose sum is σ = 522776524608. Its totient is φ = 66935629440.

The previous prime is 221031130109. The next prime is 221031130127.

221031130122 is a `hidden beast` number, since 22 + 10 + 311 + 301 + 22 = 666.

221031130122 is nontrivially palindromic in base 10.

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 = 221031130095 and 221031130104.

It is not an unprimeable number, because it can be changed into a prime (221031130127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56223 + ... + 667250.

It is an arithmetic number, because the mean of its divisors is an integer number (10891177596).

Almost surely, 2^221031130122 is an apocalyptic number.

221031130122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221031130122 is an abundant number, since it is smaller than the sum of its proper divisors (301745394486).

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

221031130122 is a wasteful number, since it uses less digits than its factorization.

221031130122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725035 (or 725032 counting only the distinct ones).

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

It can be divided in two parts, 221031 and 130122, that added together give a palindrome (351153).

The spelling of 221031130122 in words is "two hundred twenty-one billion, thirty-one million, one hundred thirty thousand, one hundred twenty-two".