120021135 has 16 divisors (see below), whose sum is σ = 206805984. Its totient is φ = 59087232.

The previous prime is 120021101. The next prime is 120021137. The reversal of 120021135 is 531120021.

It is not a de Polignac number, because 120021135 - 2¹⁰ = 120020111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307552 + ... + 307941.

It is an arithmetic number, because the mean of its divisors is an integer number (12925374).

Almost surely, 2^120021135 is an apocalyptic number.

120021135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120021135 is a deficient number, since it is larger than the sum of its proper divisors (86784849).

120021135 is a wasteful number, since it uses less digits than its factorization.

120021135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615514.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 120021135 is about 10955.4157839856. The cubic root of 120021135 is about 493.2713706063.

Adding to 120021135 its reverse (531120021), we get a palindrome (651141156).

The spelling of 120021135 in words is "one hundred twenty million, twenty-one thousand, one hundred thirty-five".