221432230402381 has 2 divisors, whose sum is σ = 221432230402382. Its totient is φ = 221432230402380.

The previous prime is 221432230402289. The next prime is 221432230402469. The reversal of 221432230402381 is 183204032234122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112934382989481 + 108497847412900 = 10627059^2 + 10416230^2 .

It is a cyclic number.

It is not a de Polignac number, because 221432230402381 - 2¹³ = 221432230394189 is a prime.

It is a super-2 number, since 2×221432230402381² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221432230402381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221432230402181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110716115201190 + 110716115201191.

It is an arithmetic number, because the mean of its divisors is an integer number (110716115201191).

Almost surely, 2^{221432230402381} is an apocalyptic number.

It is an amenable number.

221432230402381 is a deficient number, since it is larger than the sum of its proper divisors (1).

221432230402381 is an equidigital number, since it uses as much as digits as its factorization.

221432230402381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 221432230402381 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred thirty million, four hundred two thousand, three hundred eighty-one".