21102340125412 has 48 divisors (see below), whose sum is σ = 45740692291840. Its totient is φ = 8295005377152.

The previous prime is 21102340125403. The next prime is 21102340125431. The reversal of 21102340125412 is 21452104320112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184571712 + ... + 184686007.

Almost surely, 2^{21102340125412} is an apocalyptic number.

It is an amenable number.

21102340125412 is an abundant number, since it is smaller than the sum of its proper divisors (24638352166428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102340125412 is a wasteful number, since it uses less digits than its factorization.

21102340125412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369257900 (or 369257898 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 21102340125412 its reverse (21452104320112), we get a palindrome (42554444445524).

The spelling of 21102340125412 in words is "twenty-one trillion, one hundred two billion, three hundred forty million, one hundred twenty-five thousand, four hundred twelve".