21013141235 has 16 divisors (see below), whose sum is σ = 25455983616. Its totient is φ = 16650805248.

The previous prime is 21013141213. The next prime is 21013141249. The reversal of 21013141235 is 53214131012.

It is a cyclic number.

It is not a de Polignac number, because 21013141235 - 2⁸ = 21013140979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21013141235.

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, 364979 + ... + 418611.

It is an arithmetic number, because the mean of its divisors is an integer number (1590998976).

Almost surely, 2^21013141235 is an apocalyptic number.

21013141235 is a deficient number, since it is larger than the sum of its proper divisors (4442842381).

21013141235 is a wasteful number, since it uses less digits than its factorization.

21013141235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54382.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21013141235 its reverse (53214131012), we get a palindrome (74227272247).

The spelling of 21013141235 in words is "twenty-one billion, thirteen million, one hundred forty-one thousand, two hundred thirty-five".