1122221212021 has 8 divisors (see below), whose sum is σ = 1381195337984. Its totient is φ = 887911288560.

The previous prime is 1122221211997. The next prime is 1122221212033. The reversal of 1122221212021 is 1202121222211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122221212021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122221212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122221212081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6166050525 + ... + 6166050706.

It is an arithmetic number, because the mean of its divisors is an integer number (172649417248).

Almost surely, 2^{1122221212021} is an apocalyptic number.

It is an amenable number.

1122221212021 is a deficient number, since it is larger than the sum of its proper divisors (258974125963).

1122221212021 is a wasteful number, since it uses less digits than its factorization.

1122221212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12332101251.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1122221212021 its reverse (1202121222211), we get a palindrome (2324342434232).

The spelling of 1122221212021 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".