102801072921 has 4 divisors (see below), whose sum is σ = 137068097232. Its totient is φ = 68534048612.

The previous prime is 102801072919. The next prime is 102801072923. The reversal of 102801072921 is 129270108201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (102801072919) and next prime (102801072923).

It is a cyclic number.

It is not a de Polignac number, because 102801072921 - 2¹ = 102801072919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102801072923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17133512151 + ... + 17133512156.

It is an arithmetic number, because the mean of its divisors is an integer number (34267024308).

Almost surely, 2^102801072921 is an apocalyptic number.

It is an amenable number.

102801072921 is a deficient number, since it is larger than the sum of its proper divisors (34267024311).

102801072921 is an equidigital number, since it uses as much as digits as its factorization.

102801072921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34267024310.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 102801072921 in words is "one hundred two billion, eight hundred one million, seventy-two thousand, nine hundred twenty-one".