131122222220 has 48 divisors (see below), whose sum is σ = 300617152416. Its totient is φ = 47644608000.

The previous prime is 131122222211. The next prime is 131122222237. The reversal of 131122222220 is 22222221131.

It is a super-2 number, since 2×131122222220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131122222192 and 131122222201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65030 + ... + 516210.

It is an arithmetic number, because the mean of its divisors is an integer number (6262857342).

Almost surely, 2^131122222220 is an apocalyptic number.

131122222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131122222220 is an abundant number, since it is smaller than the sum of its proper divisors (169494930196).

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

131122222220 is a wasteful number, since it uses less digits than its factorization.

131122222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452522 (or 452520 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 131122222220 its reverse (22222221131), we get a palindrome (153344443351).

The spelling of 131122222220 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".