22121011121213 has 2 divisors, whose sum is σ = 22121011121214. Its totient is φ = 22121011121212.

The previous prime is 22121011121203. The next prime is 22121011121227. The reversal of 22121011121213 is 31212111012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20542314363769 + 1578696757444 = 4532363^2 + 1256462^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121011121213 - 2³⁴ = 22103831252029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121011121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060505560606 + 11060505560607.

It is an arithmetic number, because the mean of its divisors is an integer number (11060505560607).

Almost surely, 2^{22121011121213} is an apocalyptic number.

It is an amenable number.

22121011121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121011121213 is an equidigital number, since it uses as much as digits as its factorization.

22121011121213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 22121011121213 its reverse (31212111012122), we get a palindrome (53333122133335).

The spelling of 22121011121213 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred thirteen".