22212121011 has 4 divisors (see below), whose sum is σ = 29616161352. Its totient is φ = 14808080672.

The previous prime is 22212120871. The next prime is 22212121037. The reversal of 22212121011 is 11012121222.

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

It is a cyclic number.

It is not a de Polignac number, because 22212121011 - 2¹⁴ = 22212104627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22212191011) 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, 3702020166 + ... + 3702020171.

It is an arithmetic number, because the mean of its divisors is an integer number (7404040338).

Almost surely, 2^22212121011 is an apocalyptic number.

22212121011 is a deficient number, since it is larger than the sum of its proper divisors (7404040341).

22212121011 is an equidigital number, since it uses as much as digits as its factorization.

22212121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404040340.

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

Adding to 22212121011 its reverse (11012121222), we get a palindrome (33224242233).

The spelling of 22212121011 in words is "twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, eleven".