122077217221 has 2 divisors, whose sum is σ = 122077217222. Its totient is φ = 122077217220.

The previous prime is 122077217183. The next prime is 122077217239. The reversal of 122077217221 is 122712770221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120280644225 + 1796572996 = 346815^2 + 42386^2 .

It is a cyclic number.

It is not a de Polignac number, because 122077217221 - 2²³ = 122068828613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122077227221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61038608610 + 61038608611.

It is an arithmetic number, because the mean of its divisors is an integer number (61038608611).

Almost surely, 2^122077217221 is an apocalyptic number.

It is an amenable number.

122077217221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122077217221 is an equidigital number, since it uses as much as digits as its factorization.

122077217221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10976, while the sum is 34.

Adding to 122077217221 its reverse (122712770221), we get a palindrome (244789987442).

The spelling of 122077217221 in words is "one hundred twenty-two billion, seventy-seven million, two hundred seventeen thousand, two hundred twenty-one".