21222010121011 has 4 divisors (see below), whose sum is σ = 24253725852592. Its totient is φ = 18190294389432.

The previous prime is 21222010120943. The next prime is 21222010121029. The reversal of 21222010121011 is 11012101022212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222010121011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222010121041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515857865780 + ... + 1515857865793.

It is an arithmetic number, because the mean of its divisors is an integer number (6063431463148).

Almost surely, 2^{21222010121011} is an apocalyptic number.

21222010121011 is a deficient number, since it is larger than the sum of its proper divisors (3031715731581).

21222010121011 is an equidigital number, since it uses as much as digits as its factorization.

21222010121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031715731580.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21222010121011 its reverse (11012101022212), we get a palindrome (32234111143223).

The spelling of 21222010121011 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred twenty-one thousand, eleven".