90211120213 has 2 divisors, whose sum is σ = 90211120214. Its totient is φ = 90211120212.

The previous prime is 90211120163. The next prime is 90211120217. The reversal of 90211120213 is 31202111209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54013013649 + 36198106564 = 232407^2 + 190258^2 .

It is a cyclic number.

It is not a de Polignac number, because 90211120213 - 2¹³ = 90211112021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90211120217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45105560106 + 45105560107.

It is an arithmetic number, because the mean of its divisors is an integer number (45105560107).

Almost surely, 2^90211120213 is an apocalyptic number.

It is an amenable number.

90211120213 is a deficient number, since it is larger than the sum of its proper divisors (1).

90211120213 is an equidigital number, since it uses as much as digits as its factorization.

90211120213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 90211120213 in words is "ninety billion, two hundred eleven million, one hundred twenty thousand, two hundred thirteen".