1022131231020 has 96 divisors (see below), whose sum is σ = 3347330380800. Its totient is φ = 258222624192.

The previous prime is 1022131230977. The next prime is 1022131231031. The reversal of 1022131231020 is 201321312201.

1022131231020 is a `hidden beast` number, since 1 + 0 + 2 + 21 + 312 + 310 + 20 = 666.

It is a super-2 number, since 2×1022131231020² (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 = 1022131230984 and 1022131231002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49801204 + ... + 49821723.

It is an arithmetic number, because the mean of its divisors is an integer number (34868024800).

Almost surely, 2^{1022131231020} is an apocalyptic number.

1022131231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022131231020 is an abundant number, since it is smaller than the sum of its proper divisors (2325199149780).

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

1022131231020 is a wasteful number, since it uses less digits than its factorization.

1022131231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99622964 (or 99622956 counting only the distinct ones).

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

Adding to 1022131231020 its reverse (201321312201), we get a palindrome (1223452543221).

The spelling of 1022131231020 in words is "one trillion, twenty-two billion, one hundred thirty-one million, two hundred thirty-one thousand, twenty".