21343121412 has 48 divisors (see below), whose sum is σ = 51033810240. Its totient is φ = 6939756928.

The previous prime is 21343121407. The next prime is 21343121431. The reversal of 21343121412 is 21412134312.

It is a nude number because it is divisible by every one of its digits.

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, 13039 + ... + 207017.

It is an arithmetic number, because the mean of its divisors is an integer number (1063204380).

Almost surely, 2^21343121412 is an apocalyptic number.

It is an amenable number.

21343121412 is an abundant number, since it is smaller than the sum of its proper divisors (29690688828).

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

21343121412 is a wasteful number, since it uses less digits than its factorization.

21343121412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194212 (or 194210 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 21343121412 its reverse (21412134312), we get a palindrome (42755255724).

The spelling of 21343121412 in words is "twenty-one billion, three hundred forty-three million, one hundred twenty-one thousand, four hundred twelve".