21011202022209 has 16 divisors (see below), whose sum is σ = 33702178682880. Its totient is φ = 11374485305040.

The previous prime is 21011202022201. The next prime is 21011202022211. The reversal of 21011202022209 is 90222020211012.

It is not a de Polignac number, because 21011202022209 - 2³ = 21011202022201 is a prime.

It is a super-2 number, since 2×21011202022209² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011202022201) 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, 26329826697 + ... + 26329827494.

It is an arithmetic number, because the mean of its divisors is an integer number (2106386167680).

Almost surely, 2^{21011202022209} is an apocalyptic number.

It is an amenable number.

21011202022209 is a deficient number, since it is larger than the sum of its proper divisors (12690976660671).

21011202022209 is a wasteful number, since it uses less digits than its factorization.

21011202022209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52659654220.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21011202022209 in words is "twenty-one trillion, eleven billion, two hundred two million, twenty-two thousand, two hundred nine".