102152620821 has 16 divisors (see below), whose sum is σ = 137026820736. Its totient is φ = 67690291776.

The previous prime is 102152620807. The next prime is 102152620853. The reversal of 102152620821 is 128026251201.

It is not a de Polignac number, because 102152620821 - 2⁵ = 102152620789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102152620021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121216 + ... + 2168838.

It is an arithmetic number, because the mean of its divisors is an integer number (8564176296).

Almost surely, 2^102152620821 is an apocalyptic number.

It is an amenable number.

102152620821 is a deficient number, since it is larger than the sum of its proper divisors (34874199915).

102152620821 is a wasteful number, since it uses less digits than its factorization.

102152620821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51932.

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 102152620821 in words is "one hundred two billion, one hundred fifty-two million, six hundred twenty thousand, eight hundred twenty-one".