120152121605 has 4 divisors (see below), whose sum is σ = 144182545932. Its totient is φ = 96121697280.

The previous prime is 120152121589. The next prime is 120152121653. The reversal of 120152121605 is 506121251021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506121251021 = 237373 ⋅2132177.

It can be written as a sum of positive squares in 2 ways, for example, as 40564376836 + 79587744769 = 201406^2 + 282113^2 .

It is not a de Polignac number, because 120152121605 - 2⁴ = 120152121589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12015212156 + ... + 12015212165.

It is an arithmetic number, because the mean of its divisors is an integer number (36045636483).

Almost surely, 2^120152121605 is an apocalyptic number.

It is an amenable number.

120152121605 is a deficient number, since it is larger than the sum of its proper divisors (24030424327).

120152121605 is an equidigital number, since it uses as much as digits as its factorization.

120152121605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24030424326.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 120152121605 its reverse (506121251021), we get a palindrome (626273372626).

The spelling of 120152121605 in words is "one hundred twenty billion, one hundred fifty-two million, one hundred twenty-one thousand, six hundred five".