221112011001210 has 512 divisors, whose sum is σ = 649033482240000. Its totient is φ = 47134135996416.

The previous prime is 221112011001179. The next prime is 221112011001221. The reversal of 221112011001210 is 12100110211122.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221112011001210.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 21262809591 + ... + 21262819989.

It is an arithmetic number, because the mean of its divisors is an integer number (1267643520000).

Almost surely, 2^{221112011001210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221112011001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324516741120000).

221112011001210 is an abundant number, since it is smaller than the sum of its proper divisors (427921471238790).

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

221112011001210 is a wasteful number, since it uses less digits than its factorization.

221112011001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11158.

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

Adding to 221112011001210 its reverse (12100110211122), we get a palindrome (233212121212332).

The spelling of 221112011001210 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, one thousand, two hundred ten".