21222000121011 has 16 divisors (see below), whose sum is σ = 28326396833280. Its totient is φ = 14132805834080.

The previous prime is 21222000120989. The next prime is 21222000121031. The reversal of 21222000121011 is 11012100022212.

It is a cyclic number.

It is not a de Polignac number, because 21222000121011 - 2²⁷ = 21221865903283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222000121031) 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, 20403766 + ... + 21418628.

It is an arithmetic number, because the mean of its divisors is an integer number (1770399802080).

Almost surely, 2^{21222000121011} is an apocalyptic number.

21222000121011 is a deficient number, since it is larger than the sum of its proper divisors (7104396712269).

21222000121011 is a wasteful number, since it uses less digits than its factorization.

21222000121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022346.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21222000121011 its reverse (11012100022212), we get a palindrome (32234100143223).

The spelling of 21222000121011 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one thousand, eleven".