22211201977 has 2 divisors, whose sum is σ = 22211201978. Its totient is φ = 22211201976.

The previous prime is 22211201941. The next prime is 22211202007. The reversal of 22211201977 is 77910211222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12632860816 + 9578341161 = 112396^2 + 97869^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211201977 - 2¹⁵ = 22211169209 is a prime.

It is not a weakly prime, because it can be changed into another prime (22215201977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105600988 + 11105600989.

It is an arithmetic number, because the mean of its divisors is an integer number (11105600989).

Almost surely, 2^22211201977 is an apocalyptic number.

It is an amenable number.

22211201977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211201977 is an equidigital number, since it uses as much as digits as its factorization.

22211201977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 22211201977 in words is "twenty-two billion, two hundred eleven million, two hundred one thousand, nine hundred seventy-seven".