120121120981 has 8 divisors (see below), whose sum is σ = 127310211864. Its totient is φ = 112945712640.

The previous prime is 120121120979. The next prime is 120121121011. The reversal of 120121120981 is 189021121021.

It can be written as a sum of positive squares in 4 ways, for example, as 104335460100 + 15785660881 = 323010^2 + 125641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120121120981 - 2¹ = 120121120979 is a prime.

It is a super-2 number, since 2×120121120981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121120961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3402550 + ... + 3437671.

It is an arithmetic number, because the mean of its divisors is an integer number (15913776483).

Almost surely, 2^120121120981 is an apocalyptic number.

It is an amenable number.

120121120981 is a deficient number, since it is larger than the sum of its proper divisors (7189090883).

120121120981 is a wasteful number, since it uses less digits than its factorization.

120121120981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6841271.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 120121120981 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, nine hundred eighty-one".