121020100244 has 6 divisors (see below), whose sum is σ = 211785175434. Its totient is φ = 60510050120.

The previous prime is 121020100213. The next prime is 121020100261. The reversal of 121020100244 is 442001020121.

It can be written as a sum of positive squares in only one way, i.e., 62365072900 + 58655027344 = 249730^2 + 242188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15127512527 + ... + 15127512534.

It is an arithmetic number, because the mean of its divisors is an integer number (35297529239).

Almost surely, 2^121020100244 is an apocalyptic number.

It is an amenable number.

121020100244 is a deficient number, since it is larger than the sum of its proper divisors (90765075190).

121020100244 is a wasteful number, since it uses less digits than its factorization.

121020100244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255025065 (or 30255025063 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121020100244 its reverse (442001020121), we get a palindrome (563021120365).

The spelling of 121020100244 in words is "one hundred twenty-one billion, twenty million, one hundred thousand, two hundred forty-four".