90201001123 has 2 divisors, whose sum is σ = 90201001124. Its totient is φ = 90201001122.

The previous prime is 90201001117. The next prime is 90201001159. The reversal of 90201001123 is 32110010209.

It is a weak prime.

It is an emirp because it is prime and its reverse (32110010209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90201001123 - 2⁹ = 90201000611 is a prime.

It is a super-2 number, since 2×90201001123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90201001123.

It is not a weakly prime, because it can be changed into another prime (90201001193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45100500561 + 45100500562.

It is an arithmetic number, because the mean of its divisors is an integer number (45100500562).

Almost surely, 2^90201001123 is an apocalyptic number.

90201001123 is a deficient number, since it is larger than the sum of its proper divisors (1).

90201001123 is an equidigital number, since it uses as much as digits as its factorization.

90201001123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 90201001123 in words is "ninety billion, two hundred one million, one thousand, one hundred twenty-three".