221232283031 has 2 divisors, whose sum is σ = 221232283032. Its totient is φ = 221232283030.

The previous prime is 221232282989. The next prime is 221232283033. The reversal of 221232283031 is 130382232122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221232283031 is a prime.

It is a super-2 number, since 2×221232283031² (a number of 23 digits) contains 22 as substring.

Together with 221232283033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221232282985 and 221232283003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232283033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616141515 + 110616141516.

It is an arithmetic number, because the mean of its divisors is an integer number (110616141516).

Almost surely, 2^221232283031 is an apocalyptic number.

221232283031 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232283031 is an equidigital number, since it uses as much as digits as its factorization.

221232283031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 221232283031 in words is "two hundred twenty-one billion, two hundred thirty-two million, two hundred eighty-three thousand, thirty-one".