21213543306034 has 16 divisors (see below), whose sum is σ = 32057308440000. Its totient is φ = 10527877978864.

The previous prime is 21213543306023. The next prime is 21213543306061. The reversal of 21213543306034 is 43060334531212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21213543305984 and 21213543306002.

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, 25630084 + ... + 26444815.

It is an arithmetic number, because the mean of its divisors is an integer number (2003581777500).

Almost surely, 2^{21213543306034} is an apocalyptic number.

21213543306034 is a deficient number, since it is larger than the sum of its proper divisors (10843765133966).

21213543306034 is a wasteful number, since it uses less digits than its factorization.

21213543306034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52076417.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 21213543306034 its reverse (43060334531212), we get a palindrome (64273877837246).

The spelling of 21213543306034 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred six thousand, thirty-four".