2120212031 has 4 divisors (see below), whose sum is σ = 2423099472. Its totient is φ = 1817324592.

The previous prime is 2120212019. The next prime is 2120212063. The reversal of 2120212031 is 1302120212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120212031 is a prime.

It is a super-2 number, since 2×2120212031² = 8990598112794289922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120211997 and 2120212015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120212331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151443710 + ... + 151443723.

It is an arithmetic number, because the mean of its divisors is an integer number (605774868).

Almost surely, 2^2120212031 is an apocalyptic number.

2120212031 is a deficient number, since it is larger than the sum of its proper divisors (302887441).

2120212031 is an equidigital number, since it uses as much as digits as its factorization.

2120212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302887440.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2120212031 is about 46045.7601848422. The cubic root of 2120212031 is about 1284.6744836016.

Adding to 2120212031 its reverse (1302120212), we get a palindrome (3422332243).

It can be divided in two parts, 21202 and 12031, that added together give a palindrome (33233).

The spelling of 2120212031 in words is "two billion, one hundred twenty million, two hundred twelve thousand, thirty-one".