145120414222921 has 2 divisors, whose sum is σ = 145120414222922. Its totient is φ = 145120414222920.

The previous prime is 145120414222877. The next prime is 145120414222939. The reversal of 145120414222921 is 129222414021541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96667830720400 + 48452583502521 = 9831980^2 + 6960789^2 .

It is a cyclic number.

It is not a de Polignac number, because 145120414222921 - 2³¹ = 145118266739273 is a prime.

It is not a weakly prime, because it can be changed into another prime (145123414222921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560207111460 + 72560207111461.

It is an arithmetic number, because the mean of its divisors is an integer number (72560207111461).

Almost surely, 2^{145120414222921} is an apocalyptic number.

It is an amenable number.

145120414222921 is a deficient number, since it is larger than the sum of its proper divisors (1).

145120414222921 is an equidigital number, since it uses as much as digits as its factorization.

145120414222921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 145120414222921 in words is "one hundred forty-five trillion, one hundred twenty billion, four hundred fourteen million, two hundred twenty-two thousand, nine hundred twenty-one".