131122213202 has 4 divisors (see below), whose sum is σ = 196683319806. Its totient is φ = 65561106600.

The previous prime is 131122213199. The next prime is 131122213213. The reversal of 131122213202 is 202312221131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202312221131 = 36083 ⋅5606857.

It can be written as a sum of positive squares in only one way, i.e., 127885627321 + 3236585881 = 357611^2 + 56891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780553299 + ... + 32780553302.

Almost surely, 2^131122213202 is an apocalyptic number.

131122213202 is a deficient number, since it is larger than the sum of its proper divisors (65561106604).

131122213202 is an equidigital number, since it uses as much as digits as its factorization.

131122213202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65561106603.

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

Adding to 131122213202 its reverse (202312221131), we get a palindrome (333434434333).

The spelling of 131122213202 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred two".