101392921 has 4 divisors (see below), whose sum is σ = 115877632. Its totient is φ = 86908212.

The previous prime is 101392897. The next prime is 101392927. The reversal of 101392921 is 129293101.

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 a cyclic number.

It is not a de Polignac number, because 101392921 - 2⁷ = 101392793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101392921.

It is not an unprimeable number, because it can be changed into a prime (101392927) 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, 7242345 + ... + 7242358.

It is an arithmetic number, because the mean of its divisors is an integer number (28969408).

Almost surely, 2^101392921 is an apocalyptic number.

It is an amenable number.

101392921 is a deficient number, since it is larger than the sum of its proper divisors (14484711).

101392921 is an equidigital number, since it uses as much as digits as its factorization.

101392921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14484710.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 101392921 is about 10069.4051959388. The cubic root of 101392921 is about 466.3040758868.

It can be divided in two parts, 10 and 1392921, that added together give a palindrome (1392931).

The spelling of 101392921 in words is "one hundred one million, three hundred ninety-two thousand, nine hundred twenty-one".