121000010008 has 16 divisors (see below), whose sum is σ = 226879170480. Its totient is φ = 60498897888.

The previous prime is 121000009997. The next prime is 121000010009. The reversal of 121000010008 is 800010000121.

It is a super-2 number, since 2×121000010008² (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 121000010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000010009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498541 + ... + 700387.

It is an arithmetic number, because the mean of its divisors is an integer number (14179948155).

Almost surely, 2^121000010008 is an apocalyptic number.

It is an amenable number.

121000010008 is a deficient number, since it is larger than the sum of its proper divisors (105879160472).

121000010008 is a wasteful number, since it uses less digits than its factorization.

121000010008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276786 (or 276782 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121000010008 its reverse (800010000121), we get a palindrome (921010010129).

The spelling of 121000010008 in words is "one hundred twenty-one billion, ten thousand, eight".