2102021021101 has 4 divisors (see below), whose sum is σ = 2102330558304. Its totient is φ = 2101711483900.

The previous prime is 2102021021081. The next prime is 2102021021143. The reversal of 2102021021101 is 1011201202012.

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 2102021021101 - 2⁷ = 2102021020973 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 (2102021021161) 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, 154758415 + ... + 154771996.

It is an arithmetic number, because the mean of its divisors is an integer number (525582639576).

Almost surely, 2^{2102021021101} is an apocalyptic number.

It is an amenable number.

2102021021101 is a deficient number, since it is larger than the sum of its proper divisors (309537203).

2102021021101 is an equidigital number, since it uses as much as digits as its factorization.

2102021021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309537202.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2102021021101 its reverse (1011201202012), we get a palindrome (3113222223113).

The spelling of 2102021021101 in words is "two trillion, one hundred two billion, twenty-one million, twenty-one thousand, one hundred one".