121000010121 has 12 divisors (see below), whose sum is σ = 174782265840. Its totient is φ = 80664608760.

The previous prime is 121000010093. The next prime is 121000010129. The reversal of 121000010121 is 121010000121.

It is a happy number.

It is not a de Polignac number, because 121000010121 - 2¹⁵ = 120999977353 is a prime.

It is a super-3 number, since 3×121000010121³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121000010129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254866 + ... + 554036.

It is an arithmetic number, because the mean of its divisors is an integer number (14565188820).

Almost surely, 2^121000010121 is an apocalyptic number.

It is an amenable number.

121000010121 is a deficient number, since it is larger than the sum of its proper divisors (53782255719).

121000010121 is a wasteful number, since it uses less digits than its factorization.

121000010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344116 (or 344113 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121000010121 its reverse (121010000121), we get a palindrome (242010010242).

The spelling of 121000010121 in words is "one hundred twenty-one billion, ten thousand, one hundred twenty-one".