21123412414 has 32 divisors (see below), whose sum is σ = 34595527680. Its totient is φ = 9672245856.

The previous prime is 21123412391. The next prime is 21123412417. The reversal of 21123412414 is 41421432112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123412417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539112 + ... + 576964.

It is an arithmetic number, because the mean of its divisors is an integer number (1081110240).

Almost surely, 2^21123412414 is an apocalyptic number.

21123412414 is a deficient number, since it is larger than the sum of its proper divisors (13472115266).

21123412414 is a wasteful number, since it uses less digits than its factorization.

21123412414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38021 (or 37995 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 21123412414 its reverse (41421432112), we get a palindrome (62544844526).

The spelling of 21123412414 in words is "twenty-one billion, one hundred twenty-three million, four hundred twelve thousand, four hundred fourteen".