221131133310 has 64 divisors (see below), whose sum is σ = 542981532672. Its totient is φ = 57609837696.

The previous prime is 221131133303. The next prime is 221131133317. The reversal of 221131133310 is 13331131122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221131133303) and next prime (221131133317).

It is a super-2 number, since 2×221131133310² (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 (221131133317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644589 + ... + 926151.

It is an arithmetic number, because the mean of its divisors is an integer number (8484086448).

Almost surely, 2^221131133310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221131133310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271490766336).

221131133310 is an abundant number, since it is smaller than the sum of its proper divisors (321850399362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221131133310 is a wasteful number, since it uses less digits than its factorization.

221131133310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282177.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 221131133310 its reverse (13331131122), we get a palindrome (234462264432).

The spelling of 221131133310 in words is "two hundred twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred ten".