21311131221202 has 16 divisors (see below), whose sum is σ = 32811996420000. Its totient is φ = 10374840732960.

The previous prime is 21311131221181. The next prime is 21311131221271. The reversal of 21311131221202 is 20212213111312.

It is a happy number.

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, 260371752 + ... + 260453587.

It is an arithmetic number, because the mean of its divisors is an integer number (2050749776250).

Almost surely, 2^{21311131221202} is an apocalyptic number.

21311131221202 is a deficient number, since it is larger than the sum of its proper divisors (11500865198798).

21311131221202 is a wasteful number, since it uses less digits than its factorization.

21311131221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520825881.

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

Adding to 21311131221202 its reverse (20212213111312), we get a palindrome (41523344332514).

The spelling of 21311131221202 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred two".