2101212021101 has 4 divisors (see below), whose sum is σ = 2101235813952. Its totient is φ = 2101188228252.

The previous prime is 2101212021079. The next prime is 2101212021107. The reversal of 2101212021101 is 1011202121012.

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 2101212021101 - 2¹⁰ = 2101212020077 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 (2101212021107) 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, 11763461 + ... + 11940746.

It is an arithmetic number, because the mean of its divisors is an integer number (525308953488).

Almost surely, 2^{2101212021101} is an apocalyptic number.

It is an amenable number.

2101212021101 is a deficient number, since it is larger than the sum of its proper divisors (23792851).

2101212021101 is an equidigital number, since it uses as much as digits as its factorization.

2101212021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23792850.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101212021101 its reverse (1011202121012), we get a palindrome (3112414142113).

The spelling of 2101212021101 in words is "two trillion, one hundred one billion, two hundred twelve million, twenty-one thousand, one hundred one".