101263958921 has 4 divisors (see below), whose sum is σ = 101265184272. Its totient is φ = 101262733572.

The previous prime is 101263958911. The next prime is 101263958941. The reversal of 101263958921 is 129859362101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 129859362101 = 7 ⋅18551337443.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101263958921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101263958911) 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, 478991 + ... + 657236.

It is an arithmetic number, because the mean of its divisors is an integer number (25316296068).

Almost surely, 2^101263958921 is an apocalyptic number.

It is an amenable number.

101263958921 is a deficient number, since it is larger than the sum of its proper divisors (1225351).

101263958921 is an equidigital number, since it uses as much as digits as its factorization.

101263958921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225350.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 101263958921 in words is "one hundred one billion, two hundred sixty-three million, nine hundred fifty-eight thousand, nine hundred twenty-one".