120021423989 has 2 divisors, whose sum is σ = 120021423990. Its totient is φ = 120021423988.

The previous prime is 120021423941. The next prime is 120021424021. The reversal of 120021423989 is 989324120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118651313764 + 1370110225 = 344458^2 + 37015^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021423989 - 2¹² = 120021419893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021423289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010711994 + 60010711995.

It is an arithmetic number, because the mean of its divisors is an integer number (60010711995).

Almost surely, 2^120021423989 is an apocalyptic number.

It is an amenable number.

120021423989 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021423989 is an equidigital number, since it uses as much as digits as its factorization.

120021423989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 120021423989 in words is "one hundred twenty billion, twenty-one million, four hundred twenty-three thousand, nine hundred eighty-nine".