121202211221121 has 16 divisors (see below), whose sum is σ = 162706026134528. Its totient is φ = 80250151410000.

The previous prime is 121202211221089. The next prime is 121202211221153. The reversal of 121202211221121 is 121122112202121.

It is an interprime number because it is at equal distance from previous prime (121202211221089) and next prime (121202211221153).

It is not a de Polignac number, because 121202211221121 - 2⁵ = 121202211221089 is a prime.

It is a super-3 number, since 3×121202211221121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121202211220121) 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, 24777451 + ... + 29263056.

It is an arithmetic number, because the mean of its divisors is an integer number (10169126633408).

Almost surely, 2^{121202211221121} is an apocalyptic number.

It is an amenable number.

121202211221121 is a deficient number, since it is larger than the sum of its proper divisors (41503814913407).

121202211221121 is a wasteful number, since it uses less digits than its factorization.

121202211221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54045612.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121202211221121 its reverse (121122112202121), we get a palindrome (242324323423242).

The spelling of 121202211221121 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".