120021131 has 4 divisors (see below), whose sum is σ = 120123432. Its totient is φ = 119918832.

The previous prime is 120021101. The next prime is 120021137. The reversal of 120021131 is 131120021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120021131 - 2⁶ = 120021067 is a prime.

It is a super-2 number, since 2×120021131² = 28810143773038322, which contains 22 as substring.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49370 + ... + 51743.

It is an arithmetic number, because the mean of its divisors is an integer number (30030858).

Almost surely, 2^120021131 is an apocalyptic number.

120021131 is a deficient number, since it is larger than the sum of its proper divisors (102301).

120021131 is a wasteful number, since it uses less digits than its factorization.

120021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102300.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 120021131 is about 10955.4156014275. The cubic root of 120021131 is about 493.2713651265.

Adding to 120021131 its reverse (131120021), we get a palindrome (251141152).

It can be divided in two parts, 120021 and 131, that multiplied together give a palindrome (15722751).

The spelling of 120021131 in words is "one hundred twenty million, twenty-one thousand, one hundred thirty-one".