131321212021 has 8 divisors (see below), whose sum is σ = 132169572864. Its totient is φ = 130473589680.

The previous prime is 131321211979. The next prime is 131321212063. The reversal of 131321212021 is 120212123131.

It is an interprime number because it is at equal distance from previous prime (131321211979) and next prime (131321212063).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131321212021 - 2⁷ = 131321211893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131321212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321212081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174411 + ... + 541351.

It is an arithmetic number, because the mean of its divisors is an integer number (16521196608).

Almost surely, 2^131321212021 is an apocalyptic number.

It is an amenable number.

131321212021 is a deficient number, since it is larger than the sum of its proper divisors (848360843).

131321212021 is a wasteful number, since it uses less digits than its factorization.

131321212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369251.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131321212021 its reverse (120212123131), we get a palindrome (251533335152).

The spelling of 131321212021 in words is "one hundred thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, twenty-one".