121120112121 has 16 divisors (see below), whose sum is σ = 166783323648. Its totient is φ = 78104332800.

The previous prime is 121120112077. The next prime is 121120112137. The reversal of 121120112121 is 121211021121.

It is a happy number.

It is not a de Polignac number, because 121120112121 - 2¹¹ = 121120110073 is a prime.

It is a super-2 number, since 2×121120112121² (a number of 23 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 121120112121.

It is not an unprimeable number, because it can be changed into a prime (121120112221) 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, 119386 + ... + 506451.

It is an arithmetic number, because the mean of its divisors is an integer number (10423957728).

Almost surely, 2^121120112121 is an apocalyptic number.

It is an amenable number.

121120112121 is a deficient number, since it is larger than the sum of its proper divisors (45663211527).

121120112121 is a wasteful number, since it uses less digits than its factorization.

121120112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627952.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121120112121 its reverse (121211021121), we get a palindrome (242331133242).

The spelling of 121120112121 in words is "one hundred twenty-one billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty-one".