21201133402 has 8 divisors (see below), whose sum is σ = 32541274656. Its totient is φ = 10354041852.

The previous prime is 21201133391. The next prime is 21201133433. The reversal of 21201133402 is 20433110212.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21201133402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123262318 + ... + 123262489.

It is an arithmetic number, because the mean of its divisors is an integer number (4067659332).

Almost surely, 2^21201133402 is an apocalyptic number.

21201133402 is a deficient number, since it is larger than the sum of its proper divisors (11340141254).

21201133402 is a wasteful number, since it uses less digits than its factorization.

21201133402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246524852.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21201133402 its reverse (20433110212), we get a palindrome (41634243614).

The spelling of 21201133402 in words is "twenty-one billion, two hundred one million, one hundred thirty-three thousand, four hundred two".