21103430412 has 24 divisors (see below), whose sum is σ = 49437525312. Its totient is φ = 7006450000.

The previous prime is 21103430353. The next prime is 21103430429. The reversal of 21103430412 is 21403430112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3500214 + ... + 3506237.

It is an arithmetic number, because the mean of its divisors is an integer number (2059896888).

Almost surely, 2^21103430412 is an apocalyptic number.

It is an amenable number.

21103430412 is an abundant number, since it is smaller than the sum of its proper divisors (28334094900).

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

21103430412 is a wasteful number, since it uses less digits than its factorization.

21103430412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006709 (or 7006707 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21103430412 its reverse (21403430112), we get a palindrome (42506860524).

The spelling of 21103430412 in words is "twenty-one billion, one hundred three million, four hundred thirty thousand, four hundred twelve".