121022222201 has 2 divisors, whose sum is σ = 121022222202. Its totient is φ = 121022222200.

The previous prime is 121022222149. The next prime is 121022222213. The reversal of 121022222201 is 102222220121.

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., 101266514176 + 19755708025 = 318224^2 + 140555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121022222201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121022222201.

It is not a weakly prime, because it can be changed into another prime (121022222231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511111100 + 60511111101.

It is an arithmetic number, because the mean of its divisors is an integer number (60511111101).

Almost surely, 2^121022222201 is an apocalyptic number.

It is an amenable number.

121022222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022222201 is an equidigital number, since it uses as much as digits as its factorization.

121022222201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121022222201 its reverse (102222220121), we get a palindrome (223244442322).

The spelling of 121022222201 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, two hundred one".