22012121029 has 2 divisors, whose sum is σ = 22012121030. Its totient is φ = 22012121028.

The previous prime is 22012121017. The next prime is 22012121059. The reversal of 22012121029 is 92012121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21553176100 + 458944929 = 146810^2 + 21423^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012121029 - 2³¹ = 19864637381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012121059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006060514 + 11006060515.

It is an arithmetic number, because the mean of its divisors is an integer number (11006060515).

Almost surely, 2^22012121029 is an apocalyptic number.

It is an amenable number.

22012121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012121029 is an equidigital number, since it uses as much as digits as its factorization.

22012121029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 22012121029 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, twenty-nine".