2102101012021 has 8 divisors (see below), whose sum is σ = 2151621553664. Its totient is φ = 2052609310080.

The previous prime is 2102101012003. The next prime is 2102101012027. The reversal of 2102101012021 is 1202101012012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102101012021 - 2²⁷ = 2101966794293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102101011992 and 2102101012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102101012027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7062396 + ... + 7354021.

It is an arithmetic number, because the mean of its divisors is an integer number (268952694208).

Almost surely, 2^{2102101012021} is an apocalyptic number.

It is an amenable number.

2102101012021 is a deficient number, since it is larger than the sum of its proper divisors (49520541643).

2102101012021 is a wasteful number, since it uses less digits than its factorization.

2102101012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14419851.

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

Adding to 2102101012021 its reverse (1202101012012), we get a palindrome (3304202024033).

Subtracting from 2102101012021 its reverse (1202101012012), we obtain a palindrome (900000000009).

The spelling of 2102101012021 in words is "two trillion, one hundred two billion, one hundred one million, twelve thousand, twenty-one".