100801147021 has 2 divisors, whose sum is σ = 100801147022. Its totient is φ = 100801147020.

The previous prime is 100801147019. The next prime is 100801147169. The reversal of 100801147021 is 120741108001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99153192996 + 1647954025 = 314886^2 + 40595^2 .

It is a cyclic number.

It is not a de Polignac number, because 100801147021 - 2¹ = 100801147019 is a prime.

Together with 100801147019, 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 (100801144021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50400573510 + 50400573511.

It is an arithmetic number, because the mean of its divisors is an integer number (50400573511).

Almost surely, 2^100801147021 is an apocalyptic number.

It is an amenable number.

100801147021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100801147021 is an equidigital number, since it uses as much as digits as its factorization.

100801147021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

The spelling of 100801147021 in words is "one hundred billion, eight hundred one million, one hundred forty-seven thousand, twenty-one".