1222122220101 has 54 divisors (see below), whose sum is σ = 1834101600786. Its totient is φ = 784087128000.

The previous prime is 1222122220093. The next prime is 1222122220153. The reversal of 1222122220101 is 1010222212221.

It is a happy number.

1222122220101 is a `hidden beast` number, since 1 + 222 + 122 + 220 + 101 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1009771755876 + 212350464225 = 1004874^2 + 460815^2 .

It is not a de Polignac number, because 1222122220101 - 2³ = 1222122220093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222122220181) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1233220716 + ... + 1233221706.

It is an arithmetic number, because the mean of its divisors is an integer number (33964844459).

Almost surely, 2^{1222122220101} is an apocalyptic number.

It is an amenable number.

1222122220101 is a deficient number, since it is larger than the sum of its proper divisors (611979380685).

1222122220101 is an frugal number, since it uses more digits than its factorization.

1222122220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222122220101 its reverse (1010222212221), we get a palindrome (2232344432322).

The spelling of 1222122220101 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, one hundred one".