101261621 has 4 divisors (see below), whose sum is σ = 106591200. Its totient is φ = 95932044.

The previous prime is 101261597. The next prime is 101261651. The reversal of 101261621 is 126162101.

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 101261621 - 2¹⁸ = 100999477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101261593 and 101261602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101261651) 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, 2664761 + ... + 2664798.

It is an arithmetic number, because the mean of its divisors is an integer number (26647800).

Almost surely, 2^101261621 is an apocalyptic number.

It is an amenable number.

101261621 is a deficient number, since it is larger than the sum of its proper divisors (5329579).

101261621 is an equidigital number, since it uses as much as digits as its factorization.

101261621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329578.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 101261621 is about 10062.8833343133. The cubic root of 101261621 is about 466.1027068894.

The spelling of 101261621 in words is "one hundred one million, two hundred sixty-one thousand, six hundred twenty-one".