1220543543041 has 4 divisors (see below), whose sum is σ = 1273610653632. Its totient is φ = 1167476432452.

The previous prime is 1220543543039. The next prime is 1220543543057. The reversal of 1220543543041 is 1403453450221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220543543041 - 2¹ = 1220543543039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220543542988 and 1220543543006.

It is not an unprimeable number, because it can be changed into a prime (1220543543341) 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, 26533555261 + ... + 26533555306.

It is an arithmetic number, because the mean of its divisors is an integer number (318402663408).

Almost surely, 2^{1220543543041} is an apocalyptic number.

It is an amenable number.

1220543543041 is a deficient number, since it is larger than the sum of its proper divisors (53067110591).

1220543543041 is an equidigital number, since it uses as much as digits as its factorization.

1220543543041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53067110590.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 1220543543041 its reverse (1403453450221), we get a palindrome (2623996993262).

It can be divided in two parts, 1220543 and 543041, that added together give a square (1763584 = 1328²).

The spelling of 1220543543041 in words is "one trillion, two hundred twenty billion, five hundred forty-three million, five hundred forty-three thousand, forty-one".