221043042311331 has 4 divisors (see below), whose sum is σ = 294724056415112. Its totient is φ = 147362028207552.

The previous prime is 221043042311327. The next prime is 221043042311383. The reversal of 221043042311331 is 133113240340122.

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

It is not a de Polignac number, because 221043042311331 - 2² = 221043042311327 is a prime.

It is a super-2 number, since 2×221043042311331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221043042311731) 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, 36840507051886 + ... + 36840507051891.

It is an arithmetic number, because the mean of its divisors is an integer number (73681014103778).

Almost surely, 2^{221043042311331} is an apocalyptic number.

221043042311331 is a deficient number, since it is larger than the sum of its proper divisors (73681014103781).

221043042311331 is an equidigital number, since it uses as much as digits as its factorization.

221043042311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73681014103780.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 221043042311331 its reverse (133113240340122), we get a palindrome (354156282651453).

The spelling of 221043042311331 in words is "two hundred twenty-one trillion, forty-three billion, forty-two million, three hundred eleven thousand, three hundred thirty-one".