2231012021 has 16 divisors (see below), whose sum is σ = 2644323840. Its totient is φ = 1841683200.

The previous prime is 2231012011. The next prime is 2231012023. The reversal of 2231012021 is 1202101322.

It is a happy number.

2231012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2231012021 is a prime.

It is a super-3 number, since 3×2231012021³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231011987 and 2231012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231012023) 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, 67700 + ... + 95106.

It is an arithmetic number, because the mean of its divisors is an integer number (165270240).

Almost surely, 2^2231012021 is an apocalyptic number.

It is an amenable number.

2231012021 is a deficient number, since it is larger than the sum of its proper divisors (413311819).

2231012021 is a wasteful number, since it uses less digits than its factorization.

2231012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27844.

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

The square root of 2231012021 is about 47233.5899651932. The cubic root of 2231012021 is about 1306.6741618152.

Adding to 2231012021 its reverse (1202101322), we get a palindrome (3433113343).

The spelling of 2231012021 in words is "two billion, two hundred thirty-one million, twelve thousand, twenty-one".