13220131402 has 8 divisors (see below), whose sum is σ = 19930858596. Its totient is φ = 6576511872.

The previous prime is 13220131399. The next prime is 13220131403. The reversal of 13220131402 is 20413102231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13093996041 + 126135361 = 114429^2 + 11231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13220131402² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13220131402.

It is not an unprimeable number, because it can be changed into a prime (13220131403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16776423 + ... + 16777210.

Almost surely, 2^13220131402 is an apocalyptic number.

13220131402 is a deficient number, since it is larger than the sum of its proper divisors (6710727194).

13220131402 is a wasteful number, since it uses less digits than its factorization.

13220131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33553832.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13220131402 its reverse (20413102231), we get a palindrome (33633233633).

The spelling of 13220131402 in words is "thirteen billion, two hundred twenty million, one hundred thirty-one thousand, four hundred two".