120421223981 has 2 divisors, whose sum is σ = 120421223982. Its totient is φ = 120421223980.

The previous prime is 120421223977. The next prime is 120421224061. The reversal of 120421223981 is 189322124021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108729127081 + 11692096900 = 329741^2 + 108130^2 .

It is a cyclic number.

It is not a de Polignac number, because 120421223981 - 2² = 120421223977 is a prime.

It is a super-2 number, since 2×120421223981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120421223921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210611990 + 60210611991.

It is an arithmetic number, because the mean of its divisors is an integer number (60210611991).

Almost surely, 2^120421223981 is an apocalyptic number.

It is an amenable number.

120421223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

120421223981 is an equidigital number, since it uses as much as digits as its factorization.

120421223981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 120421223981 in words is "one hundred twenty billion, four hundred twenty-one million, two hundred twenty-three thousand, nine hundred eighty-one".