21122222212011 has 16 divisors (see below), whose sum is σ = 28173705840000. Its totient is φ = 14076110502720.

The previous prime is 21122222211991. The next prime is 21122222212031. The reversal of 21122222212011 is 11021222222112.

It is an interprime number because it is at equal distance from previous prime (21122222211991) and next prime (21122222212031).

It is not a de Polignac number, because 21122222212011 - 2¹⁰ = 21122222210987 is a prime.

It is a super-2 number, since 2×21122222212011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122222212031) 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, 237062676 + ... + 237151758.

It is an arithmetic number, because the mean of its divisors is an integer number (1760856615000).

Almost surely, 2^{21122222212011} is an apocalyptic number.

21122222212011 is a deficient number, since it is larger than the sum of its proper divisors (7051483627989).

21122222212011 is a wasteful number, since it uses less digits than its factorization.

21122222212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118346.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21122222212011 its reverse (11021222222112), we get a palindrome (32143444434123).

The spelling of 21122222212011 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twelve thousand, eleven".