1220002101543 has 4 divisors (see below), whose sum is σ = 1626669468728. Its totient is φ = 813334734360.

The previous prime is 1220002101523. The next prime is 1220002101553. The reversal of 1220002101543 is 3451012000221.

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

It is not a de Polignac number, because 1220002101543 - 2⁸ = 1220002101287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002101523) 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, 203333683588 + ... + 203333683593.

It is an arithmetic number, because the mean of its divisors is an integer number (406667367182).

Almost surely, 2^{1220002101543} is an apocalyptic number.

1220002101543 is a deficient number, since it is larger than the sum of its proper divisors (406667367185).

1220002101543 is an equidigital number, since it uses as much as digits as its factorization.

1220002101543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406667367184.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1220002101543 its reverse (3451012000221), we get a palindrome (4671014101764).

The spelling of 1220002101543 in words is "one trillion, two hundred twenty billion, two million, one hundred one thousand, five hundred forty-three".