1101221055413 has 4 divisors (see below), whose sum is σ = 1102723404108. Its totient is φ = 1099718706720.

The previous prime is 1101221055391. The next prime is 1101221055421. The reversal of 1101221055413 is 3145501221011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 615499873444 + 485721181969 = 784538^2 + 696937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221055413 - 2⁶ = 1101221055349 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 (1101221055463) 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, 751173248 + ... + 751174713.

It is an arithmetic number, because the mean of its divisors is an integer number (275680851027).

Almost surely, 2^{1101221055413} is an apocalyptic number.

It is an amenable number.

1101221055413 is a deficient number, since it is larger than the sum of its proper divisors (1502348695).

1101221055413 is an equidigital number, since it uses as much as digits as its factorization.

1101221055413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502348694.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1101221055413 its reverse (3145501221011), we get a palindrome (4246722276424).

The spelling of 1101221055413 in words is "one trillion, one hundred one billion, two hundred twenty-one million, fifty-five thousand, four hundred thirteen".