2102121032123 has 12 divisors (see below), whose sum is σ = 2445713033400. Its totient is φ = 1801531714752.

The previous prime is 2102121032111. The next prime is 2102121032177. The reversal of 2102121032123 is 3212301212012.

It is not a de Polignac number, because 2102121032123 - 2²⁸ = 2101852596667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102121032095 and 2102121032104.

It is not an unprimeable number, because it can be changed into a prime (2102121032023) 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 11 ways as a sum of consecutive naturals, for example, 3096686 + ... + 3713987.

It is an arithmetic number, because the mean of its divisors is an integer number (203809419450).

Almost surely, 2^{2102121032123} is an apocalyptic number.

2102121032123 is a deficient number, since it is larger than the sum of its proper divisors (343592001277).

2102121032123 is an equidigital number, since it uses as much as digits as its factorization.

2102121032123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816986 (or 6816979 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2102121032123 its reverse (3212301212012), we get a palindrome (5314422244135).

The spelling of 2102121032123 in words is "two trillion, one hundred two billion, one hundred twenty-one million, thirty-two thousand, one hundred twenty-three".