131220213122 has 16 divisors (see below), whose sum is σ = 208417536000. Its totient is φ = 61748033088.

The previous prime is 131220213121. The next prime is 131220213143. The reversal of 131220213122 is 221312022131.

It is a junction number, because it is equal to n+sod(n) for n = 131220213094 and 131220213103.

It is not an unprimeable number, because it can be changed into a prime (131220213121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881879 + ... + 1019877.

It is an arithmetic number, because the mean of its divisors is an integer number (13026096000).

Almost surely, 2^131220213122 is an apocalyptic number.

131220213122 is a deficient number, since it is larger than the sum of its proper divisors (77197322878).

131220213122 is a wasteful number, since it uses less digits than its factorization.

131220213122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165985.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131220213122 its reverse (221312022131), we get a palindrome (352532235253).

The spelling of 131220213122 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred thirteen thousand, one hundred twenty-two".