100121002121 has 32 divisors (see below), whose sum is σ = 127049783040. Its totient is φ = 76916238336.

The previous prime is 100121002067. The next prime is 100121002133. The reversal of 100121002121 is 121200121001.

It is not a de Polignac number, because 100121002121 - 2⁶ = 100121002057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121002181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53210 + ... + 450636.

It is an arithmetic number, because the mean of its divisors is an integer number (3970305720).

Almost surely, 2^100121002121 is an apocalyptic number.

It is an amenable number.

100121002121 is a deficient number, since it is larger than the sum of its proper divisors (26928780919).

100121002121 is a wasteful number, since it uses less digits than its factorization.

100121002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397553.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100121002121 its reverse (121200121001), we get a palindrome (221321123122).

The spelling of 100121002121 in words is "one hundred billion, one hundred twenty-one million, two thousand, one hundred twenty-one".