120212521 has 16 divisors (see below), whose sum is σ = 141821568. Its totient is φ = 100454400.

The previous prime is 120212509. The next prime is 120212527. The reversal of 120212521 is 125212021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120212521 - 2¹⁵ = 120179753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120212495 and 120212504.

It is not an unprimeable number, because it can be changed into a prime (120212527) 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, 35116 + ... + 38386.

It is an arithmetic number, because the mean of its divisors is an integer number (8863848).

Almost surely, 2^120212521 is an apocalyptic number.

120212521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120212521 is a deficient number, since it is larger than the sum of its proper divisors (21609047).

120212521 is a wasteful number, since it uses less digits than its factorization.

120212521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 120212521 is about 10964.1470712500. The cubic root of 120212521 is about 493.5334219507.

Adding to 120212521 its reverse (125212021), we get a palindrome (245424542).

The spelling of 120212521 in words is "one hundred twenty million, two hundred twelve thousand, five hundred twenty-one".