100121300020021 has 16 divisors (see below), whose sum is σ = 118121527903104. Its totient is φ = 83080691817984.

The previous prime is 100121300020013. The next prime is 100121300020081. The reversal of 100121300020021 is 120020003121001.

It is not a de Polignac number, because 100121300020021 - 2³ = 100121300020013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121300019983 and 100121300020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121300020081) 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, 1471775296 + ... + 1471843321.

It is an arithmetic number, because the mean of its divisors is an integer number (7382595493944).

Almost surely, 2^{100121300020021} is an apocalyptic number.

It is an amenable number.

100121300020021 is a deficient number, since it is larger than the sum of its proper divisors (18000227883083).

100121300020021 is a wasteful number, since it uses less digits than its factorization.

100121300020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943618780.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100121300020021 its reverse (120020003121001), we get a palindrome (220141303141022).

The spelling of 100121300020021 in words is "one hundred trillion, one hundred twenty-one billion, three hundred million, twenty thousand, twenty-one".