90212221013 has 2 divisors, whose sum is σ = 90212221014. Its totient is φ = 90212221012.

The previous prime is 90212221003. The next prime is 90212221019. The reversal of 90212221013 is 31012221209.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71520409489 + 18691811524 = 267433^2 + 136718^2 .

It is a cyclic number.

It is not a de Polignac number, because 90212221013 - 2⁶ = 90212220949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90212221013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90212221019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45106110506 + 45106110507.

It is an arithmetic number, because the mean of its divisors is an integer number (45106110507).

Almost surely, 2^90212221013 is an apocalyptic number.

It is an amenable number.

90212221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

90212221013 is an equidigital number, since it uses as much as digits as its factorization.

90212221013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 90212221013 in words is "ninety billion, two hundred twelve million, two hundred twenty-one thousand, thirteen".