221102001331 has 4 divisors (see below), whose sum is σ = 221103254464. Its totient is φ = 221100748200.

The previous prime is 221102001259. The next prime is 221102001359. The reversal of 221102001331 is 133100201122.

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

It is a cyclic number.

It is not a de Polignac number, because 221102001331 - 2¹³ = 221101993139 is a prime.

It is a super-2 number, since 2×221102001331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102001031) 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, 307875 + ... + 732796.

It is an arithmetic number, because the mean of its divisors is an integer number (55275813616).

Almost surely, 2^221102001331 is an apocalyptic number.

221102001331 is a deficient number, since it is larger than the sum of its proper divisors (1253133).

221102001331 is a wasteful number, since it uses less digits than its factorization.

221102001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253132.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221102001331 its reverse (133100201122), we get a palindrome (354202202453).

The spelling of 221102001331 in words is "two hundred twenty-one billion, one hundred two million, one thousand, three hundred thirty-one".