130231212021 has 40 divisors (see below), whose sum is σ = 202130959800. Its totient is φ = 83460585600.

The previous prime is 130231211983. The next prime is 130231212029. The reversal of 130231212021 is 120212132031.

It can be written as a sum of positive squares in 4 ways, for example, as 46617128100 + 83614083921 = 215910^2 + 289161^2 .

It is not a de Polignac number, because 130231212021 - 2⁷ = 130231211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130231211985 and 130231212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130231212029) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 416871 + ... + 658971.

It is an arithmetic number, because the mean of its divisors is an integer number (5053273995).

Almost surely, 2^130231212021 is an apocalyptic number.

It is an amenable number.

130231212021 is a deficient number, since it is larger than the sum of its proper divisors (71899747779).

130231212021 is a wasteful number, since it uses less digits than its factorization.

130231212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242371 (or 242362 counting only the distinct ones).

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

Adding to 130231212021 its reverse (120212132031), we get a palindrome (250443344052).

The spelling of 130231212021 in words is "one hundred thirty billion, two hundred thirty-one million, two hundred twelve thousand, twenty-one".