131121222 has 16 divisors (see below), whose sum is σ = 262396992. Its totient is φ = 43681320.

The previous prime is 131121181. The next prime is 131121241. The reversal of 131121222 is 222121131.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6633 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (16399812).

Almost surely, 2^131121222 is an apocalyptic number.

131121222 is an abundant number, since it is smaller than the sum of its proper divisors (131275770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131121222 is a wasteful number, since it uses less digits than its factorization.

131121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12883.

The product of its digits is 48, while the sum is 15.

The square root of 131121222 is about 11450.8175253997. The cubic root of 131121222 is about 508.0319151421.

Adding to 131121222 its reverse (222121131), we get a palindrome (353242353).

Subtracting 131121222 from its reverse (222121131), we obtain a palindrome (90999909).

The spelling of 131121222 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-two".