21311311221202 has 8 divisors (see below), whose sum is σ = 32118469044912. Its totient is φ = 10605154872900.

The previous prime is 21311311221197. The next prime is 21311311221377. The reversal of 21311311221202 is 20212211311312.

It is a happy number.

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

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, 25250368324 + ... + 25250369167.

It is an arithmetic number, because the mean of its divisors is an integer number (4014808630614).

Almost surely, 2^{21311311221202} is an apocalyptic number.

21311311221202 is a deficient number, since it is larger than the sum of its proper divisors (10807157823710).

21311311221202 is a wasteful number, since it uses less digits than its factorization.

21311311221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50500737704.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21311311221202 its reverse (20212211311312), we get a palindrome (41523522532514).

The spelling of 21311311221202 in words is "twenty-one trillion, three hundred eleven billion, three hundred eleven million, two hundred twenty-one thousand, two hundred two".