102025650621 has 4 divisors (see below), whose sum is σ = 136034200832. Its totient is φ = 68017100412.

The previous prime is 102025650599. The next prime is 102025650641. The reversal of 102025650621 is 126056520201.

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: 126056520201 = 3 ⋅42018840067.

It is not a de Polignac number, because 102025650621 - 2²⁹ = 101488779709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102025650641) 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, 17004275101 + ... + 17004275106.

It is an arithmetic number, because the mean of its divisors is an integer number (34008550208).

Almost surely, 2^102025650621 is an apocalyptic number.

It is an amenable number.

102025650621 is a deficient number, since it is larger than the sum of its proper divisors (34008550211).

102025650621 is an equidigital number, since it uses as much as digits as its factorization.

102025650621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34008550210.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 102025650621 in words is "one hundred two billion, twenty-five million, six hundred fifty thousand, six hundred twenty-one".