221003312103031 has 4 divisors (see below), whose sum is σ = 221003665939000. Its totient is φ = 221002958267064.

The previous prime is 221003312103011. The next prime is 221003312103043. The reversal of 221003312103031 is 130301213300122.

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 221003312103031 - 2¹⁵ = 221003312070263 is a prime.

It is a super-2 number, since 2×221003312103031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221003312102993 and 221003312103011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221003312103011) 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, 175979436 + ... + 177230833.

It is an arithmetic number, because the mean of its divisors is an integer number (55250916484750).

Almost surely, 2^{221003312103031} is an apocalyptic number.

221003312103031 is a deficient number, since it is larger than the sum of its proper divisors (353835969).

221003312103031 is an equidigital number, since it uses as much as digits as its factorization.

221003312103031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353835968.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 221003312103031 its reverse (130301213300122), we get a palindrome (351304525403153).

The spelling of 221003312103031 in words is "two hundred twenty-one trillion, three billion, three hundred twelve million, one hundred three thousand, thirty-one".