11221112001021 has 96 divisors (see below), whose sum is σ = 18142203932160. Its totient is φ = 6111903143808.

The previous prime is 11221112000953. The next prime is 11221112001061. The reversal of 11221112001021 is 12010021112211.

It is a happy number.

It is not a de Polignac number, because 11221112001021 - 2¹⁹ = 11221111476733 is a prime.

It is a super-4 number, since 4×11221112001021⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221112001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16522666 + ... + 17188388.

It is an arithmetic number, because the mean of its divisors is an integer number (188981290960).

Almost surely, 2^{11221112001021} is an apocalyptic number.

It is an amenable number.

11221112001021 is a deficient number, since it is larger than the sum of its proper divisors (6921091931139).

11221112001021 is a wasteful number, since it uses less digits than its factorization.

11221112001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665847 (or 665824 counting only the distinct ones).

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

Adding to 11221112001021 its reverse (12010021112211), we get a palindrome (23231133113232).

The spelling of 11221112001021 in words is "eleven trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, twenty-one".