21213405331235 has 16 divisors (see below), whose sum is σ = 27863660778240. Its totient is φ = 15408476000640.

The previous prime is 21213405331231. The next prime is 21213405331333. The reversal of 21213405331235 is 53213350431212.

It is not a de Polignac number, because 21213405331235 - 2² = 21213405331231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213405331195 and 21213405331204.

It is not an unprimeable number, because it can be changed into a prime (21213405331231) 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, 2675078675 + ... + 2675086604.

It is an arithmetic number, because the mean of its divisors is an integer number (1741478798640).

Almost surely, 2^{21213405331235} is an apocalyptic number.

21213405331235 is a deficient number, since it is larger than the sum of its proper divisors (6650255447005).

21213405331235 is a wasteful number, since it uses less digits than its factorization.

21213405331235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350165358.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21213405331235 its reverse (53213350431212), we get a palindrome (74426755762447).

The spelling of 21213405331235 in words is "twenty-one trillion, two hundred thirteen billion, four hundred five million, three hundred thirty-one thousand, two hundred thirty-five".