102650021 has 12 divisors (see below), whose sum is σ = 108336000. Its totient is φ = 97160280.

The previous prime is 102650003. The next prime is 102650033. The reversal of 102650021 is 120056201.

It is not a de Polignac number, because 102650021 - 2²² = 98455717 is a prime.

It is a super-2 number, since 2×102650021² = 21074053622600882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102650071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67730 + ... + 69228.

It is an arithmetic number, because the mean of its divisors is an integer number (9028000).

Almost surely, 2^102650021 is an apocalyptic number.

It is an amenable number.

102650021 is a deficient number, since it is larger than the sum of its proper divisors (5685979).

102650021 is an equidigital number, since it uses as much as digits as its factorization.

102650021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102650021 is about 10131.6346657388. The cubic root of 102650021 is about 468.2232920994.

The spelling of 102650021 in words is "one hundred two million, six hundred fifty thousand, twenty-one".