1122112120021 has 4 divisors (see below), whose sum is σ = 1123809718444. Its totient is φ = 1120414521600.

The previous prime is 1122112120001. The next prime is 1122112120037. The reversal of 1122112120021 is 1200212112211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 879442581796 + 242669538225 = 937786^2 + 492615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122112120021 - 2⁷ = 1122112119893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122112119977 and 1122112120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122112120001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848798220 + ... + 848799541.

It is an arithmetic number, because the mean of its divisors is an integer number (280952429611).

Almost surely, 2^{1122112120021} is an apocalyptic number.

It is an amenable number.

1122112120021 is a deficient number, since it is larger than the sum of its proper divisors (1697598423).

1122112120021 is an equidigital number, since it uses as much as digits as its factorization.

1122112120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697598422.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1122112120021 its reverse (1200212112211), we get a palindrome (2322324232232).

The spelling of 1122112120021 in words is "one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred twenty thousand, twenty-one".