2102210120021 has 8 divisors (see below), whose sum is σ = 2293710952800. Its totient is φ = 1910774424240.

The previous prime is 2102210119909. The next prime is 2102210120029. The reversal of 2102210120021 is 1200210122012.

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

It is a de Polignac number, because none of the positive numbers 2^k-2102210120021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102210119978 and 2102210120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102210120029) 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, 16216751 + ... + 16345868.

It is an arithmetic number, because the mean of its divisors is an integer number (286713869100).

Almost surely, 2^{2102210120021} is an apocalyptic number.

It is an amenable number.

2102210120021 is a deficient number, since it is larger than the sum of its proper divisors (191500832779).

2102210120021 is a wasteful number, since it uses less digits than its factorization.

2102210120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32568499.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2102210120021 its reverse (1200210122012), we get a palindrome (3302420242033).

The spelling of 2102210120021 in words is "two trillion, one hundred two billion, two hundred ten million, one hundred twenty thousand, twenty-one".