32100029981 has 2 divisors, whose sum is σ = 32100029982. Its totient is φ = 32100029980.

The previous prime is 32100029963. The next prime is 32100030077. The reversal of 32100029981 is 18992000123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27678976900 + 4421053081 = 166370^2 + 66491^2 .

It is a cyclic number.

It is not a de Polignac number, because 32100029981 - 2¹⁴ = 32100013597 is a prime.

It is a super-2 number, since 2×32100029981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32100029681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16050014990 + 16050014991.

It is an arithmetic number, because the mean of its divisors is an integer number (16050014991).

Almost surely, 2^32100029981 is an apocalyptic number.

It is an amenable number.

32100029981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32100029981 is an equidigital number, since it uses as much as digits as its factorization.

32100029981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 32100029981 in words is "thirty-two billion, one hundred million, twenty-nine thousand, nine hundred eighty-one".