221013311010 has 64 divisors (see below), whose sum is σ = 545814993024. Its totient is φ = 57233779200.

The previous prime is 221013311009. The next prime is 221013311011. The reversal of 221013311010 is 10113310122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221013311009) and next prime (221013311011).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (221013311011) 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, 387225 + ... + 769395.

It is an arithmetic number, because the mean of its divisors is an integer number (8528359266).

Almost surely, 2^221013311010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221013311010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272907496512).

221013311010 is an abundant number, since it is smaller than the sum of its proper divisors (324801682014).

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

221013311010 is a wasteful number, since it uses less digits than its factorization.

221013311010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382739.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 221013311010 its reverse (10113310122), we get a palindrome (231126621132).

The spelling of 221013311010 in words is "two hundred twenty-one billion, thirteen million, three hundred eleven thousand, ten".