2121000110101 has 4 divisors (see below), whose sum is σ = 2121006674304. Its totient is φ = 2120993545900.

The previous prime is 2121000110083. The next prime is 2121000110111. The reversal of 2121000110101 is 1010110001212.

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 2121000110101 - 2⁷ = 2121000109973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000110111) 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, 2770885 + ... + 3452506.

It is an arithmetic number, because the mean of its divisors is an integer number (530251668576).

Almost surely, 2^{2121000110101} is an apocalyptic number.

It is an amenable number.

2121000110101 is a deficient number, since it is larger than the sum of its proper divisors (6564203).

2121000110101 is an equidigital number, since it uses as much as digits as its factorization.

2121000110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564202.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2121000110101 its reverse (1010110001212), we get a palindrome (3131110111313).

The spelling of 2121000110101 in words is "two trillion, one hundred twenty-one billion, one hundred ten thousand, one hundred one".