1220100323535 has 12 divisors (see below), whose sum is σ = 2114840560872. Its totient is φ = 650720172528.

The previous prime is 1220100323531. The next prime is 1220100323537. The reversal of 1220100323535 is 5353230010221.

It is a happy number.

1220100323535 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 100 + 3 + 23 + 535 = 666.

It is not a de Polignac number, because 1220100323535 - 2² = 1220100323531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220100323499 and 1220100323508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100323531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13556670217 + ... + 13556670306.

It is an arithmetic number, because the mean of its divisors is an integer number (176236713406).

Almost surely, 2^{1220100323535} is an apocalyptic number.

1220100323535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220100323535 is a deficient number, since it is larger than the sum of its proper divisors (894740237337).

1220100323535 is a wasteful number, since it uses less digits than its factorization.

1220100323535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27113340534 (or 27113340531 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 1220100323535 its reverse (5353230010221), we get a palindrome (6573330333756).

The spelling of 1220100323535 in words is "one trillion, two hundred twenty billion, one hundred million, three hundred twenty-three thousand, five hundred thirty-five".