213020121099 has 16 divisors (see below), whose sum is σ = 299009508480. Its totient is φ = 134523768960.

The previous prime is 213020121043. The next prime is 213020121121. The reversal of 213020121099 is 990121020312.

It is not a de Polignac number, because 213020121099 - 2⁸ = 213020120843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213020171099) 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, 306259 + ... + 720995.

It is an arithmetic number, because the mean of its divisors is an integer number (18688094280).

Almost surely, 2^213020121099 is an apocalyptic number.

213020121099 is a deficient number, since it is larger than the sum of its proper divisors (85989387381).

213020121099 is a wasteful number, since it uses less digits than its factorization.

213020121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423770.

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 213020121099 in words is "two hundred thirteen billion, twenty million, one hundred twenty-one thousand, ninety-nine".