21213405435062 has 24 divisors (see below), whose sum is σ = 33586136247456. Its totient is φ = 10047515315184.

The previous prime is 21213405435041. The next prime is 21213405435091. The reversal of 21213405435062 is 26053450431212.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6380483 + ... + 9117969.

It is an arithmetic number, because the mean of its divisors is an integer number (1399422343644).

Almost surely, 2^{21213405435062} is an apocalyptic number.

21213405435062 is a deficient number, since it is larger than the sum of its proper divisors (12372730812394).

21213405435062 is a wasteful number, since it uses less digits than its factorization.

21213405435062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748260 (or 2748241 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 21213405435062 its reverse (26053450431212), we get a palindrome (47266855866274).

The spelling of 21213405435062 in words is "twenty-one trillion, two hundred thirteen billion, four hundred five million, four hundred thirty-five thousand, sixty-two".