10215621099 has 12 divisors (see below), whose sum is σ = 15302412216. Its totient is φ = 6810413904.

The previous prime is 10215621043. The next prime is 10215621121. The reversal of 10215621099 is 99012651201.

10215621099 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 562 + 1 + 0 + 99 = 666.

It is not a de Polignac number, because 10215621099 - 2⁷ = 10215620971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10215621019) 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, 21019554 + ... + 21020039.

It is an arithmetic number, because the mean of its divisors is an integer number (1275201018).

Almost surely, 2^10215621099 is an apocalyptic number.

10215621099 is a deficient number, since it is larger than the sum of its proper divisors (5086791117).

10215621099 is an frugal number, since it uses more digits than its factorization.

10215621099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42039608 (or 42039596 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The spelling of 10215621099 in words is "ten billion, two hundred fifteen million, six hundred twenty-one thousand, ninety-nine".