125021343389 has 2 divisors, whose sum is σ = 125021343390. Its totient is φ = 125021343388.

The previous prime is 125021343331. The next prime is 125021343437. The reversal of 125021343389 is 983343120521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77776843225 + 47244500164 = 278885^2 + 217358^2 .

It is a cyclic number.

It is not a de Polignac number, because 125021343389 - 2¹⁶ = 125021277853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125021343089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62510671694 + 62510671695.

It is an arithmetic number, because the mean of its divisors is an integer number (62510671695).

Almost surely, 2^125021343389 is an apocalyptic number.

It is an amenable number.

125021343389 is a deficient number, since it is larger than the sum of its proper divisors (1).

125021343389 is an equidigital number, since it uses as much as digits as its factorization.

125021343389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 125021343389 in words is "one hundred twenty-five billion, twenty-one million, three hundred forty-three thousand, three hundred eighty-nine".