120021211031 has 4 divisors (see below), whose sum is σ = 120261735000. Its totient is φ = 119780687064.

The previous prime is 120021211001. The next prime is 120021211049. The reversal of 120021211031 is 130112120021.

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 120021211031 - 2¹⁰ = 120021210007 is a prime.

It is a super-2 number, since 2×120021211031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021210997 and 120021211015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120261236 + ... + 120262233.

It is an arithmetic number, because the mean of its divisors is an integer number (30065433750).

Almost surely, 2^120021211031 is an apocalyptic number.

120021211031 is a deficient number, since it is larger than the sum of its proper divisors (240523969).

120021211031 is an equidigital number, since it uses as much as digits as its factorization.

120021211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240523968.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 120021211031 its reverse (130112120021), we get a palindrome (250133331052).

The spelling of 120021211031 in words is "one hundred twenty billion, twenty-one million, two hundred eleven thousand, thirty-one".