222621993877 has 2 divisors, whose sum is σ = 222621993878. Its totient is φ = 222621993876.

The previous prime is 222621993859. The next prime is 222621993883. The reversal of 222621993877 is 778399126222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210290113476 + 12331880401 = 458574^2 + 111049^2 .

It is a cyclic number.

It is not a de Polignac number, because 222621993877 - 2¹⁹ = 222621469589 is a prime.

It is a super-2 number, since 2×222621993877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222621993577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111310996938 + 111310996939.

It is an arithmetic number, because the mean of its divisors is an integer number (111310996939).

Almost surely, 2^222621993877 is an apocalyptic number.

It is an amenable number.

222621993877 is a deficient number, since it is larger than the sum of its proper divisors (1).

222621993877 is an equidigital number, since it uses as much as digits as its factorization.

222621993877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The spelling of 222621993877 in words is "two hundred twenty-two billion, six hundred twenty-one million, nine hundred ninety-three thousand, eight hundred seventy-seven".