21201313235 has 8 divisors (see below), whose sum is σ = 25444666080. Its totient is φ = 16958990464.

The previous prime is 21201313223. The next prime is 21201313303. The reversal of 21201313235 is 53231310212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21201313235 - 2⁴ = 21201313219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21201313235.

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, 211487 + ... + 295176.

It is an arithmetic number, because the mean of its divisors is an integer number (3180583260).

Almost surely, 2^21201313235 is an apocalyptic number.

21201313235 is a deficient number, since it is larger than the sum of its proper divisors (4243352845).

21201313235 is an equidigital number, since it uses as much as digits as its factorization.

21201313235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515037.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21201313235 its reverse (53231310212), we get a palindrome (74432623447).

The spelling of 21201313235 in words is "twenty-one billion, two hundred one million, three hundred thirteen thousand, two hundred thirty-five".