1221120122122 has 8 divisors (see below), whose sum is σ = 1894841568900. Its totient is φ = 589506265824.

The previous prime is 1221120122119. The next prime is 1221120122149. The reversal of 1221120122122 is 2212210211221.

It can be written as a sum of positive squares in 2 ways, for example, as 1128185989921 + 92934132201 = 1062161^2 + 304851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221120122122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221120122122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10526897547 + ... + 10526897662.

Almost surely, 2^{1221120122122} is an apocalyptic number.

1221120122122 is a deficient number, since it is larger than the sum of its proper divisors (673721446778).

1221120122122 is a wasteful number, since it uses less digits than its factorization.

1221120122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21053795240.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221120122122 its reverse (2212210211221), we get a palindrome (3433330333343).

The spelling of 1221120122122 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".