21131100332222 has 4 divisors (see below), whose sum is σ = 31696650498336. Its totient is φ = 10565550166110.

The previous prime is 21131100332171. The next prime is 21131100332227. The reversal of 21131100332222 is 22223300113112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131100332227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5282775083054 + ... + 5282775083057.

It is an arithmetic number, because the mean of its divisors is an integer number (7924162624584).

Almost surely, 2^{21131100332222} is an apocalyptic number.

21131100332222 is a deficient number, since it is larger than the sum of its proper divisors (10565550166114).

21131100332222 is a wasteful number, since it uses less digits than its factorization.

21131100332222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565550166113.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21131100332222 its reverse (22223300113112), we get a palindrome (43354400445334).

The spelling of 21131100332222 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred million, three hundred thirty-two thousand, two hundred twenty-two".