120231215549 has 2 divisors, whose sum is σ = 120231215550. Its totient is φ = 120231215548.

The previous prime is 120231215539. The next prime is 120231215551. The reversal of 120231215549 is 945512132021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95383998649 + 24847216900 = 308843^2 + 157630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120231215549 is a prime.

Together with 120231215551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120231215539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60115607774 + 60115607775.

It is an arithmetic number, because the mean of its divisors is an integer number (60115607775).

Almost surely, 2^120231215549 is an apocalyptic number.

It is an amenable number.

120231215549 is a deficient number, since it is larger than the sum of its proper divisors (1).

120231215549 is an equidigital number, since it uses as much as digits as its factorization.

120231215549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 120231215549 in words is "one hundred twenty billion, two hundred thirty-one million, two hundred fifteen thousand, five hundred forty-nine".