131220003004432 has 40 divisors (see below), whose sum is σ = 264368333015640. Its totient is φ = 63019361771520.

The previous prime is 131220003004411. The next prime is 131220003004469. The reversal of 131220003004432 is 234400300022131.

It can be written as a sum of positive squares in 4 ways, for example, as 49243565925376 + 81976437079056 = 7017376^2 + 9054084^2 .

It is a super-2 number, since 2×131220003004432² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131220003004397 and 131220003004406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732557419 + ... + 732736522.

It is an arithmetic number, because the mean of its divisors is an integer number (6609208325391).

Almost surely, 2^{131220003004432} is an apocalyptic number.

It is an amenable number.

131220003004432 is an abundant number, since it is smaller than the sum of its proper divisors (133148330011208).

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

131220003004432 is a wasteful number, since it uses less digits than its factorization.

131220003004432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465294171 (or 1465294165 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 131220003004432 its reverse (234400300022131), we get a palindrome (365620303026563).

The spelling of 131220003004432 in words is "one hundred thirty-one trillion, two hundred twenty billion, three million, four thousand, four hundred thirty-two".