121021112108 has 48 divisors (see below), whose sum is σ = 230428262400. Its totient is φ = 55283342400.

The previous prime is 121021112101. The next prime is 121021112111. The reversal of 121021112108 is 801211120121.

It is a happy number.

It is a super-2 number, since 2×121021112108² (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 121021112108.

It is not an unprimeable number, because it can be changed into a prime (121021112101) 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, 1945853 + ... + 2007083.

It is an arithmetic number, because the mean of its divisors is an integer number (4800588800).

Almost surely, 2^121021112108 is an apocalyptic number.

It is an amenable number.

121021112108 is a deficient number, since it is larger than the sum of its proper divisors (109407150292).

121021112108 is a wasteful number, since it uses less digits than its factorization.

121021112108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61638 (or 61636 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121021112108 its reverse (801211120121), we get a palindrome (922232232229).

The spelling of 121021112108 in words is "one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, one hundred eight".