1020100200121 has 4 divisors (see below), whose sum is σ = 1022128232832. Its totient is φ = 1018072167412.

The previous prime is 1020100200113. The next prime is 1020100200137. The reversal of 1020100200121 is 1210020010201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020100200121 - 2³ = 1020100200113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020100200098 and 1020100200107.

It is not an unprimeable number, because it can be changed into a prime (1020100200181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014015601 + ... + 1014016606.

It is an arithmetic number, because the mean of its divisors is an integer number (255532058208).

Almost surely, 2^{1020100200121} is an apocalyptic number.

It is an amenable number.

1020100200121 is a deficient number, since it is larger than the sum of its proper divisors (2028032711).

1020100200121 is an equidigital number, since it uses as much as digits as its factorization.

1020100200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028032710.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1020100200121 its reverse (1210020010201), we get a palindrome (2230120210322).

It can be divided in two parts, 1020100 and 200121, that added together give a palindrome (1220221).

The spelling of 1020100200121 in words is "one trillion, twenty billion, one hundred million, two hundred thousand, one hundred twenty-one".