1220543023535 has 32 divisors (see below), whose sum is σ = 1612957888512. Its totient is φ = 879257505280.

The previous prime is 1220543023529. The next prime is 1220543023541. The reversal of 1220543023535 is 5353203450221.

It is an interprime number because it is at equal distance from previous prime (1220543023529) and next prime (1220543023541).

It is not a de Polignac number, because 1220543023535 - 2⁸ = 1220543023279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220543023495 and 1220543023504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9926402 + ... + 10048608.

It is an arithmetic number, because the mean of its divisors is an integer number (50404934016).

Almost surely, 2^{1220543023535} is an apocalyptic number.

1220543023535 is a deficient number, since it is larger than the sum of its proper divisors (392414864977).

1220543023535 is a wasteful number, since it uses less digits than its factorization.

1220543023535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123943.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 1220543023535 its reverse (5353203450221), we get a palindrome (6573746473756).

The spelling of 1220543023535 in words is "one trillion, two hundred twenty billion, five hundred forty-three million, twenty-three thousand, five hundred thirty-five".