2231121031 has 2 divisors, whose sum is σ = 2231121032. Its totient is φ = 2231121030.

The previous prime is 2231120993. The next prime is 2231121041. The reversal of 2231121031 is 1301211322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231121031 is a prime.

It is a super-3 number, since 3×2231121031³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2231120996 and 2231121014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115560515 + 1115560516.

It is an arithmetic number, because the mean of its divisors is an integer number (1115560516).

Almost surely, 2^2231121031 is an apocalyptic number.

2231121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231121031 is an equidigital number, since it uses as much as digits as its factorization.

2231121031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2231121031 is about 47234.7438968393. The cubic root of 2231121031 is about 1306.6954433725.

Adding to 2231121031 its reverse (1301211322), we get a palindrome (3532332353).

The spelling of 2231121031 in words is "two billion, two hundred thirty-one million, one hundred twenty-one thousand, thirty-one".