22121221121011 has 2 divisors, whose sum is σ = 22121221121012. Its totient is φ = 22121221121010.

The previous prime is 22121221121003. The next prime is 22121221121023. The reversal of 22121221121011 is 11012112212122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121221121011 - 2³ = 22121221121003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22121221121011.

It is not a weakly prime, because it can be changed into another prime (22121221121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060610560505 + 11060610560506.

It is an arithmetic number, because the mean of its divisors is an integer number (11060610560506).

Almost surely, 2^{22121221121011} is an apocalyptic number.

22121221121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121221121011 is an equidigital number, since it uses as much as digits as its factorization.

22121221121011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22121221121011 its reverse (11012112212122), we get a palindrome (33133333333133).

The spelling of 22121221121011 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".