1111212221022 has 64 divisors (see below), whose sum is σ = 2752228454400. Its totient is φ = 330267404160.

The previous prime is 1111212220967. The next prime is 1111212221029. The reversal of 1111212221022 is 2201222121111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1111212220986 and 1111212221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212221029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31837054 + ... + 31871937.

It is an arithmetic number, because the mean of its divisors is an integer number (43003569600).

Almost surely, 2^{1111212221022} is an apocalyptic number.

1111212221022 is an abundant number, since it is smaller than the sum of its proper divisors (1641016233378).

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

1111212221022 is a wasteful number, since it uses less digits than its factorization.

1111212221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63709038 (or 63709032 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111212221022 its reverse (2201222121111), we get a palindrome (3312434342133).

The spelling of 1111212221022 in words is "one trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, twenty-two".