2231223021 has 24 divisors (see below), whose sum is σ = 3414790080. Its totient is φ = 1399026816.

The previous prime is 2231222971. The next prime is 2231223053. The reversal of 2231223021 is 1203221322.

It is not a de Polignac number, because 2231223021 - 2⁹ = 2231222509 is a prime.

It is a super-3 number, since 3×2231223021³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2231222985 and 2231223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231223091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268710 + ... + 276888.

It is an arithmetic number, because the mean of its divisors is an integer number (142282920).

Almost surely, 2^2231223021 is an apocalyptic number.

It is an amenable number.

2231223021 is a deficient number, since it is larger than the sum of its proper divisors (1183567059).

2231223021 is a wasteful number, since it uses less digits than its factorization.

2231223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9985 (or 9982 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2231223021 is about 47235.8234923453. The cubic root of 2231223021 is about 1306.7153538175.

Adding to 2231223021 its reverse (1203221322), we get a palindrome (3434444343).

The spelling of 2231223021 in words is "two billion, two hundred thirty-one million, two hundred twenty-three thousand, twenty-one".