221001142013 has 4 divisors (see below), whose sum is σ = 221425328988. Its totient is φ = 220576955040.

The previous prime is 221001142003. The next prime is 221001142027. The reversal of 221001142013 is 310241100122.

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 63692131129 + 157309010884 = 252373^2 + 396622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001142013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221001141982 and 221001142000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001142003) 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, 212092706 + ... + 212093747.

It is an arithmetic number, because the mean of its divisors is an integer number (55356332247).

Almost surely, 2^221001142013 is an apocalyptic number.

It is an amenable number.

221001142013 is a deficient number, since it is larger than the sum of its proper divisors (424186975).

221001142013 is an equidigital number, since it uses as much as digits as its factorization.

221001142013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424186974.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221001142013 its reverse (310241100122), we get a palindrome (531242242135).

The spelling of 221001142013 in words is "two hundred twenty-one billion, one million, one hundred forty-two thousand, thirteen".