21222212212011 has 8 divisors (see below), whose sum is σ = 28350594435024. Its totient is φ = 14120985731840.

The previous prime is 21222212211947. The next prime is 21222212212039. The reversal of 21222212212011 is 11021221222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222212212011 - 2⁶ = 21222212211947 is a prime.

It is a super-2 number, since 2×21222212212011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222212212051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6788933886 + ... + 6788937011.

It is an arithmetic number, because the mean of its divisors is an integer number (3543824304378).

Almost surely, 2^{21222212212011} is an apocalyptic number.

21222212212011 is a deficient number, since it is larger than the sum of its proper divisors (7128382223013).

21222212212011 is a wasteful number, since it uses less digits than its factorization.

21222212212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13577871421.

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

Adding to 21222212212011 its reverse (11021221222212), we get a palindrome (32243433434223).

The spelling of 21222212212011 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twelve thousand, eleven".