101002999921 has 2 divisors, whose sum is σ = 101002999922. Its totient is φ = 101002999920.

The previous prime is 101002999919. The next prime is 101002999931. The reversal of 101002999921 is 129999200101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77194509921 + 23808490000 = 277839^2 + 154300^2 .

It is a cyclic number.

It is not a de Polignac number, because 101002999921 - 2¹ = 101002999919 is a prime.

Together with 101002999919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (101002999931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50501499960 + 50501499961.

It is an arithmetic number, because the mean of its divisors is an integer number (50501499961).

Almost surely, 2^101002999921 is an apocalyptic number.

It is an amenable number.

101002999921 is a deficient number, since it is larger than the sum of its proper divisors (1).

101002999921 is an equidigital number, since it uses as much as digits as its factorization.

101002999921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 101002999921 in words is "one hundred one billion, two million, nine hundred ninety-nine thousand, nine hundred twenty-one".