1220100323131 has 4 divisors (see below), whose sum is σ = 1291870930392. Its totient is φ = 1148329715872.

The previous prime is 1220100323111. The next prime is 1220100323179. The reversal of 1220100323131 is 1313230010221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220100323131 - 2⁷ = 1220100323003 is a prime.

It is a super-2 number, since 2×1220100323131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220100323099 and 1220100323108.

It is not an unprimeable number, because it can be changed into a prime (1220100323111) 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, 35885303605 + ... + 35885303638.

It is an arithmetic number, because the mean of its divisors is an integer number (322967732598).

Almost surely, 2^{1220100323131} is an apocalyptic number.

1220100323131 is a deficient number, since it is larger than the sum of its proper divisors (71770607261).

1220100323131 is an equidigital number, since it uses as much as digits as its factorization.

1220100323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71770607260.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1220100323131 its reverse (1313230010221), we get a palindrome (2533330333352).

The spelling of 1220100323131 in words is "one trillion, two hundred twenty billion, one hundred million, three hundred twenty-three thousand, one hundred thirty-one".