100121220210209 has 16 divisors (see below), whose sum is σ = 115648450949376. Its totient is φ = 85664911084800.

The previous prime is 100121220210203. The next prime is 100121220210223. The reversal of 100121220210209 is 902012022121001.

It is a cyclic number.

It is not a de Polignac number, because 100121220210209 - 2²⁰ = 100121219161633 is a prime.

It is a super-2 number, since 2×100121220210209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121220210203) 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, 63549224 + ... + 65105654.

It is an arithmetic number, because the mean of its divisors is an integer number (7228028184336).

Almost surely, 2^{100121220210209} is an apocalyptic number.

It is an amenable number.

100121220210209 is a deficient number, since it is larger than the sum of its proper divisors (15527230739167).

100121220210209 is a wasteful number, since it uses less digits than its factorization.

100121220210209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900456.

The product of its (nonzero) digits is 288, while the sum is 23.

It can be divided in two parts, 10012 and 1220210209, that added together give a palindrome (1220220221).

The spelling of 100121220210209 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, two hundred nine".