221240010031 has 2 divisors, whose sum is σ = 221240010032. Its totient is φ = 221240010030.

The previous prime is 221240009989. The next prime is 221240010073. The reversal of 221240010031 is 130010042122.

It is a balanced prime because it is at equal distance from previous prime (221240009989) and next prime (221240010073).

It is a cyclic number.

It is not a de Polignac number, because 221240010031 - 2¹³ = 221240001839 is a prime.

It is a super-2 number, since 2×221240010031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221240009987 and 221240010014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221240014031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110620005015 + 110620005016.

It is an arithmetic number, because the mean of its divisors is an integer number (110620005016).

Almost surely, 2^221240010031 is an apocalyptic number.

221240010031 is a deficient number, since it is larger than the sum of its proper divisors (1).

221240010031 is an equidigital number, since it uses as much as digits as its factorization.

221240010031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221240010031 its reverse (130010042122), we get a palindrome (351250052153).

The spelling of 221240010031 in words is "two hundred twenty-one billion, two hundred forty million, ten thousand, thirty-one".