21020112099969 has 8 divisors (see below), whose sum is σ = 28784297650560. Its totient is φ = 13634667308016.

The previous prime is 21020112099859. The next prime is 21020112099989. The reversal of 21020112099969 is 96999021102012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21020112099969 - 2⁷ = 21020112099841 is a prime.

It is a super-2 number, since 2×21020112099969² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020112099989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94685189529 + ... + 94685189750.

It is an arithmetic number, because the mean of its divisors is an integer number (3598037206320).

Almost surely, 2^{21020112099969} is an apocalyptic number.

It is an amenable number.

21020112099969 is a deficient number, since it is larger than the sum of its proper divisors (7764185550591).

21020112099969 is a wasteful number, since it uses less digits than its factorization.

21020112099969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189370379319.

The product of its (nonzero) digits is 314928, while the sum is 51.

The spelling of 21020112099969 in words is "twenty-one trillion, twenty billion, one hundred twelve million, ninety-nine thousand, nine hundred sixty-nine".