21130331131222 has 4 divisors (see below), whose sum is σ = 31695496696836. Its totient is φ = 10565165565610.

The previous prime is 21130331131211. The next prime is 21130331131229. The reversal of 21130331131222 is 22213113303112.

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 (21130331131229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5282582782804 + ... + 5282582782807.

It is an arithmetic number, because the mean of its divisors is an integer number (7923874174209).

Almost surely, 2^{21130331131222} is an apocalyptic number.

21130331131222 is a deficient number, since it is larger than the sum of its proper divisors (10565165565614).

21130331131222 is a wasteful number, since it uses less digits than its factorization.

21130331131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565165565613.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21130331131222 its reverse (22213113303112), we get a palindrome (43343444434334).

The spelling of 21130331131222 in words is "twenty-one trillion, one hundred thirty billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-two".