20010010202121 has 4 divisors (see below), whose sum is σ = 26680013602832. Its totient is φ = 13340006801412.

The previous prime is 20010010202111. The next prime is 20010010202123. The reversal of 20010010202121 is 12120201001002.

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 not a de Polignac number, because 20010010202121 - 2⁹ = 20010010201609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010010202097 and 20010010202106.

It is not an unprimeable number, because it can be changed into a prime (20010010202123) 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, 3335001700351 + ... + 3335001700356.

It is an arithmetic number, because the mean of its divisors is an integer number (6670003400708).

Almost surely, 2^{20010010202121} is an apocalyptic number.

It is an amenable number.

20010010202121 is a deficient number, since it is larger than the sum of its proper divisors (6670003400711).

20010010202121 is an equidigital number, since it uses as much as digits as its factorization.

20010010202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670003400710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20010010202121 its reverse (12120201001002), we get a palindrome (32130211203123).

The spelling of 20010010202121 in words is "twenty trillion, ten billion, ten million, two hundred two thousand, one hundred twenty-one".