22212420977 has 2 divisors, whose sum is σ = 22212420978. Its totient is φ = 22212420976.

The previous prime is 22212420973. The next prime is 22212421057. The reversal of 22212420977 is 77902421222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15355918561 + 6856502416 = 123919^2 + 82804^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212420977 - 2² = 22212420973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22212420977.

It is not a weakly prime, because it can be changed into another prime (22212420973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106210488 + 11106210489.

It is an arithmetic number, because the mean of its divisors is an integer number (11106210489).

Almost surely, 2^22212420977 is an apocalyptic number.

It is an amenable number.

22212420977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212420977 is an equidigital number, since it uses as much as digits as its factorization.

22212420977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 22212420977 in words is "twenty-two billion, two hundred twelve million, four hundred twenty thousand, nine hundred seventy-seven".