1221120122201 has 16 divisors (see below), whose sum is σ = 1409992147200. Its totient is φ = 1035867322368.

The previous prime is 1221120122149. The next prime is 1221120122203. The reversal of 1221120122201 is 1022210211221.

It is a cyclic number.

It is not a de Polignac number, because 1221120122201 - 2²⁶ = 1221053013337 is a prime.

It is a super-2 number, since 2×1221120122201² (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 1221120122201.

It is not an unprimeable number, because it can be changed into a prime (1221120122203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633785 + ... + 1686393.

It is an arithmetic number, because the mean of its divisors is an integer number (88124509200).

Almost surely, 2^{1221120122201} is an apocalyptic number.

It is an amenable number.

1221120122201 is a deficient number, since it is larger than the sum of its proper divisors (188872024999).

1221120122201 is a wasteful number, since it uses less digits than its factorization.

1221120122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054328.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221120122201 its reverse (1022210211221), we get a palindrome (2243330333422).

The spelling of 1221120122201 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, two hundred one".