1112211122021 has 4 divisors (see below), whose sum is σ = 1112215039500. Its totient is φ = 1112207204544.

The previous prime is 1112211122003. The next prime is 1112211122023. The reversal of 1112211122021 is 1202211122111.

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 471675009796 + 640536112225 = 686786^2 + 800335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112211122021 - 2¹⁴ = 1112211105637 is a prime.

It is a super-2 number, since 2×1112211122021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112211122023) 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, 1496516 + ... + 2112813.

It is an arithmetic number, because the mean of its divisors is an integer number (278053759875).

Almost surely, 2^{1112211122021} is an apocalyptic number.

It is an amenable number.

1112211122021 is a deficient number, since it is larger than the sum of its proper divisors (3917479).

1112211122021 is an equidigital number, since it uses as much as digits as its factorization.

1112211122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917478.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1112211122021 its reverse (1202211122111), we get a palindrome (2314422244132).

The spelling of 1112211122021 in words is "one trillion, one hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, twenty-one".