221131012310 has 32 divisors (see below), whose sum is σ = 429630505920. Its totient is φ = 81462365568.

The previous prime is 221131012261. The next prime is 221131012313. The reversal of 221131012310 is 13210131122.

It is a super-2 number, since 2×221131012310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131012313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1880297 + ... + 1994436.

It is an arithmetic number, because the mean of its divisors is an integer number (13425953310).

Almost surely, 2^221131012310 is an apocalyptic number.

221131012310 is a deficient number, since it is larger than the sum of its proper divisors (208499493610).

221131012310 is a wasteful number, since it uses less digits than its factorization.

221131012310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875192.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221131012310 its reverse (13210131122), we get a palindrome (234341143432).

The spelling of 221131012310 in words is "two hundred twenty-one billion, one hundred thirty-one million, twelve thousand, three hundred ten".