121221001122 has 32 divisors (see below), whose sum is σ = 261104706240. Its totient is φ = 37296866880.

The previous prime is 121221001117. The next prime is 121221001127. The reversal of 121221001122 is 221100122121.

It is an interprime number because it is at equal distance from previous prime (121221001117) and next prime (121221001127).

It is a super-2 number, since 2×121221001122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121221001127) 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, 2746404 + ... + 2790192.

It is an arithmetic number, because the mean of its divisors is an integer number (8159522070).

Almost surely, 2^121221001122 is an apocalyptic number.

121221001122 is an abundant number, since it is smaller than the sum of its proper divisors (139883705118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221001122 is a wasteful number, since it uses less digits than its factorization.

121221001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79298.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221001122 its reverse (221100122121), we get a palindrome (342321123243).

The spelling of 121221001122 in words is "one hundred twenty-one billion, two hundred twenty-one million, one thousand, one hundred twenty-two".