221011210011012 has 96 divisors (see below), whose sum is σ = 544471884902400. Its totient is φ = 69582519562752.

The previous prime is 221011210010977. The next prime is 221011210011019. The reversal of 221011210011012 is 210110012110122.

It is a happy number.

It is a super-2 number, since 2×221011210011012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221011210010982 and 221011210011000.

It is not an unprimeable number, because it can be changed into a prime (221011210011019) 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, 1916462689 + ... + 1916578007.

It is an arithmetic number, because the mean of its divisors is an integer number (5671582134400).

Almost surely, 2^{221011210011012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221011210011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272235942451200).

221011210011012 is an abundant number, since it is smaller than the sum of its proper divisors (323460674891388).

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

221011210011012 is a wasteful number, since it uses less digits than its factorization.

221011210011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140625 (or 140623 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221011210011012 its reverse (210110012110122), we get a palindrome (431121222121134).

The spelling of 221011210011012 in words is "two hundred twenty-one trillion, eleven billion, two hundred ten million, eleven thousand, twelve".