2101512334421 has 16 divisors (see below), whose sum is σ = 2226524267520. Its totient is φ = 1976655736320.

The previous prime is 2101512334391. The next prime is 2101512334429. The reversal of 2101512334421 is 1244332151012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2101512334421 - 2³⁸ = 1826634427477 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 (2101512334429) 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 15 ways as a sum of consecutive naturals, for example, 345129545 + ... + 345135633.

It is an arithmetic number, because the mean of its divisors is an integer number (139157766720).

Almost surely, 2^{2101512334421} is an apocalyptic number.

It is an amenable number.

2101512334421 is a deficient number, since it is larger than the sum of its proper divisors (125011933099).

2101512334421 is a wasteful number, since it uses less digits than its factorization.

2101512334421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15484.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 2101512334421 its reverse (1244332151012), we get a palindrome (3345844485433).

The spelling of 2101512334421 in words is "two trillion, one hundred one billion, five hundred twelve million, three hundred thirty-four thousand, four hundred twenty-one".