32312101981 has 2 divisors, whose sum is σ = 32312101982. Its totient is φ = 32312101980.

The previous prime is 32312101979. The next prime is 32312101999. The reversal of 32312101981 is 18910121323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32001989881 + 310112100 = 178891^2 + 17610^2 .

It is an emirp because it is prime and its reverse (18910121323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32312101981 - 2¹ = 32312101979 is a prime.

It is a super-2 number, since 2×32312101981² (a number of 22 digits) contains 22 as substring.

Together with 32312101979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32312401981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16156050990 + 16156050991.

It is an arithmetic number, because the mean of its divisors is an integer number (16156050991).

Almost surely, 2^32312101981 is an apocalyptic number.

It is an amenable number.

32312101981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32312101981 is an equidigital number, since it uses as much as digits as its factorization.

32312101981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 32312101981 in words is "thirty-two billion, three hundred twelve million, one hundred one thousand, nine hundred eighty-one".