21430012012 has 12 divisors (see below), whose sum is σ = 37834402536. Its totient is φ = 10620182720.

The previous prime is 21430011989. The next prime is 21430012013. The reversal of 21430012012 is 21021003412.

It is not an unprimeable number, because it can be changed into a prime (21430012013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23705314 + ... + 23706217.

It is an arithmetic number, because the mean of its divisors is an integer number (3152866878).

Almost surely, 2^21430012012 is an apocalyptic number.

It is an amenable number.

21430012012 is a deficient number, since it is larger than the sum of its proper divisors (16404390524).

21430012012 is a wasteful number, since it uses less digits than its factorization.

21430012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47411648 (or 47411646 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21430012012 its reverse (21021003412), we get a palindrome (42451015424).

The spelling of 21430012012 in words is "twenty-one billion, four hundred thirty million, twelve thousand, twelve".