2102021012021 has 8 divisors (see below), whose sum is σ = 2402321332800. Its totient is φ = 1801723592448.

The previous prime is 2102021011997. The next prime is 2102021012111. The reversal of 2102021012021 is 1202101202012.

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 2102021012021 - 2¹⁸ = 2102020749877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102021011987 and 2102021012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102021212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150805 + ... + 2351253.

It is an arithmetic number, because the mean of its divisors is an integer number (300290166600).

Almost surely, 2^{2102021012021} is an apocalyptic number.

It is an amenable number.

2102021012021 is a deficient number, since it is larger than the sum of its proper divisors (300300320779).

2102021012021 is a wasteful number, since it uses less digits than its factorization.

2102021012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450603.

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

Adding to 2102021012021 its reverse (1202101202012), we get a palindrome (3304122214033).

The spelling of 2102021012021 in words is "two trillion, one hundred two billion, twenty-one million, twelve thousand, twenty-one".