21122000111009 has 32 divisors (see below), whose sum is σ = 24360608563200. Its totient is φ = 17939228546880.

The previous prime is 21122000110969. The next prime is 21122000111057. The reversal of 21122000111009 is 90011100022112.

It is a cyclic number.

It is not a de Polignac number, because 21122000111009 - 2⁸ = 21122000110753 is a prime.

It is a super-2 number, since 2×21122000111009² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122000111059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1208966144 + ... + 1208983614.

It is an arithmetic number, because the mean of its divisors is an integer number (761269017600).

Almost surely, 2^{21122000111009} is an apocalyptic number.

It is an amenable number.

21122000111009 is a deficient number, since it is larger than the sum of its proper divisors (3238608452191).

21122000111009 is a wasteful number, since it uses less digits than its factorization.

21122000111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19973.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 21122000111009 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred eleven thousand, nine".