1112121021 has 8 divisors (see below), whose sum is σ = 1617630624. Its totient is φ = 674012720.

The previous prime is 1112120987. The next prime is 1112121071. The reversal of 1112121021 is 1201212111.

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

It is a cyclic number.

It is not a de Polignac number, because 1112121021 - 2¹³ = 1112112829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1112120988 and 1112121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112121071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16850286 + ... + 16850351.

It is an arithmetic number, because the mean of its divisors is an integer number (202203828).

Almost surely, 2^1112121021 is an apocalyptic number.

1112121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1112121021 is a deficient number, since it is larger than the sum of its proper divisors (505509603).

1112121021 is a wasteful number, since it uses less digits than its factorization.

1112121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33700651.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1112121021 is about 33348.4785410069. The cubic root of 1112121021 is about 1036.0578761091.

Adding to 1112121021 its reverse (1201212111), we get a palindrome (2313333132).

The spelling of 1112121021 in words is "one billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".