131223220132 has 6 divisors (see below), whose sum is σ = 229640635238. Its totient is φ = 65611610064.

The previous prime is 131223220123. The next prime is 131223220159. The reversal of 131223220132 is 231022322131.

It can be written as a sum of positive squares in only one way, i.e., 120703435776 + 10519784356 = 347424^2 + 102566^2 .

It is a super-2 number, since 2×131223220132² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16402902513 + ... + 16402902520.

Almost surely, 2^131223220132 is an apocalyptic number.

It is an amenable number.

131223220132 is a deficient number, since it is larger than the sum of its proper divisors (98417415106).

131223220132 is a wasteful number, since it uses less digits than its factorization.

131223220132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32805805037 (or 32805805035 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 131223220132 its reverse (231022322131), we get a palindrome (362245542263).

The spelling of 131223220132 in words is "one hundred thirty-one billion, two hundred twenty-three million, two hundred twenty thousand, one hundred thirty-two".