20130202230991 has 2 divisors, whose sum is σ = 20130202230992. Its totient is φ = 20130202230990.

The previous prime is 20130202230977. The next prime is 20130202231037. The reversal of 20130202230991 is 19903220203102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20130202230991 - 2⁷ = 20130202230863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20130202231991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065101115495 + 10065101115496.

It is an arithmetic number, because the mean of its divisors is an integer number (10065101115496).

Almost surely, 2^{20130202230991} is an apocalyptic number.

20130202230991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130202230991 is an equidigital number, since it uses as much as digits as its factorization.

20130202230991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 20130202230991 in words is "twenty trillion, one hundred thirty billion, two hundred two million, two hundred thirty thousand, nine hundred ninety-one".