100121020211128 has 32 divisors (see below), whose sum is σ = 215159785596000. Its totient is φ = 42786060204672.

The previous prime is 100121020211087. The next prime is 100121020211129. The reversal of 100121020211128 is 821112020121001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100121020211099 and 100121020211108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121020211129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561406475 + ... + 2561445562.

It is an arithmetic number, because the mean of its divisors is an integer number (6723743299875).

Almost surely, 2^{100121020211128} is an apocalyptic number.

It is an amenable number.

100121020211128 is an abundant number, since it is smaller than the sum of its proper divisors (115038765384872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100121020211128 is a wasteful number, since it uses less digits than its factorization.

100121020211128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122852399 (or 5122852395 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 100121020211128 its reverse (821112020121001), we get a palindrome (921233040332129).

The spelling of 100121020211128 in words is "one hundred trillion, one hundred twenty-one billion, twenty million, two hundred eleven thousand, one hundred twenty-eight".