121222151005 has 16 divisors (see below), whose sum is σ = 154039823280. Its totient is φ = 91263439872.

The previous prime is 121222150963. The next prime is 121222151051. The reversal of 121222151005 is 500151222121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2449557049 + 118772593956 = 49493^2 + 344634^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222151005 - 2⁹ = 121222150493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785047 + ... + 926683.

It is an arithmetic number, because the mean of its divisors is an integer number (9627488955).

Almost surely, 2^121222151005 is an apocalyptic number.

It is an amenable number.

121222151005 is a deficient number, since it is larger than the sum of its proper divisors (32817672275).

121222151005 is a wasteful number, since it uses less digits than its factorization.

121222151005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151728.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 121222151005 its reverse (500151222121), we get a palindrome (621373373126).

The spelling of 121222151005 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred fifty-one thousand, five".