22121012237 has 2 divisors, whose sum is σ = 22121012238. Its totient is φ = 22121012236.

The previous prime is 22121012213. The next prime is 22121012239. The reversal of 22121012237 is 73221012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21993186601 + 127825636 = 148301^2 + 11306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121012237 is a prime.

Together with 22121012239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121012239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060506118 + 11060506119.

It is an arithmetic number, because the mean of its divisors is an integer number (11060506119).

Almost surely, 2^22121012237 is an apocalyptic number.

It is an amenable number.

22121012237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121012237 is an equidigital number, since it uses as much as digits as its factorization.

22121012237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 22121012237 its reverse (73221012122), we get a palindrome (95342024359).

The spelling of 22121012237 in words is "twenty-two billion, one hundred twenty-one million, twelve thousand, two hundred thirty-seven".