121222201121 has 16 divisors (see below), whose sum is σ = 146698738560. Its totient is φ = 97786241280.

The previous prime is 121222201099. The next prime is 121222201127. The reversal of 121222201121 is 121102222121.

It is not a de Polignac number, because 121222201121 - 2⁶ = 121222201057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121222201121.

It is not an unprimeable number, because it can be changed into a prime (121222201127) 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, 2716175 + ... + 2760443.

It is an arithmetic number, because the mean of its divisors is an integer number (9168671160).

Almost surely, 2^121222201121 is an apocalyptic number.

It is an amenable number.

121222201121 is a deficient number, since it is larger than the sum of its proper divisors (25476537439).

121222201121 is a wasteful number, since it uses less digits than its factorization.

121222201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67304.

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

Adding to 121222201121 its reverse (121102222121), we get a palindrome (242324423242).

The spelling of 121222201121 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, one hundred twenty-one".