2101000202121 has 4 divisors (see below), whose sum is σ = 2801333602832. Its totient is φ = 1400666801412.

The previous prime is 2101000202113. The next prime is 2101000202173. The reversal of 2101000202121 is 1212020001012.

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 2101000202121 - 2³ = 2101000202113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101000202097 and 2101000202106.

It is not an unprimeable number, because it can be changed into a prime (2101000200121) 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, 350166700351 + ... + 350166700356.

It is an arithmetic number, because the mean of its divisors is an integer number (700333400708).

Almost surely, 2^{2101000202121} is an apocalyptic number.

It is an amenable number.

2101000202121 is a deficient number, since it is larger than the sum of its proper divisors (700333400711).

2101000202121 is an equidigital number, since it uses as much as digits as its factorization.

2101000202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700333400710.

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

Adding to 2101000202121 its reverse (1212020001012), we get a palindrome (3313020203133).

The spelling of 2101000202121 in words is "two trillion, one hundred one billion, two hundred two thousand, one hundred twenty-one".