131001023028 has 12 divisors (see below), whose sum is σ = 305669053760. Its totient is φ = 43667007672.

The previous prime is 131001023003. The next prime is 131001023029. The reversal of 131001023028 is 820320100131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×131001023028² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131001022995 and 131001023013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131001023029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5458375948 + ... + 5458375971.

Almost surely, 2^131001023028 is an apocalyptic number.

It is an amenable number.

131001023028 is an abundant number, since it is smaller than the sum of its proper divisors (174668030732).

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

131001023028 is a wasteful number, since it uses less digits than its factorization.

131001023028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10916751926 (or 10916751924 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 131001023028 its reverse (820320100131), we get a palindrome (951321123159).

The spelling of 131001023028 in words is "one hundred thirty-one billion, one million, twenty-three thousand, twenty-eight".