221988694853 has 2 divisors, whose sum is σ = 221988694854. Its totient is φ = 221988694852.

The previous prime is 221988694847. The next prime is 221988694859. The reversal of 221988694853 is 358496889122.

It is a balanced prime because it is at equal distance from previous prime (221988694847) and next prime (221988694859).

It can be written as a sum of positive squares in only one way, i.e., 126098140609 + 95890554244 = 355103^2 + 309662^2 .

It is a cyclic number.

It is not a de Polignac number, because 221988694853 - 2²⁴ = 221971917637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221988694853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221988694859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110994347426 + 110994347427.

It is an arithmetic number, because the mean of its divisors is an integer number (110994347427).

Almost surely, 2^221988694853 is an apocalyptic number.

It is an amenable number.

221988694853 is a deficient number, since it is larger than the sum of its proper divisors (1).

221988694853 is an equidigital number, since it uses as much as digits as its factorization.

221988694853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59719680, while the sum is 65.

The spelling of 221988694853 in words is "two hundred twenty-one billion, nine hundred eighty-eight million, six hundred ninety-four thousand, eight hundred fifty-three".