1111421021 has 8 divisors (see below), whose sum is σ = 1147832064. Its totient is φ = 1075044960.

The previous prime is 1111421009. The next prime is 1111421029. The reversal of 1111421021 is 1201241111.

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 1111421021 - 2¹⁰ = 1111419997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111420987 and 1111421005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111421029) 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, 66146 + ... + 81228.

It is an arithmetic number, because the mean of its divisors is an integer number (143479008).

Almost surely, 2^1111421021 is an apocalyptic number.

It is an amenable number.

1111421021 is a deficient number, since it is larger than the sum of its proper divisors (36411043).

1111421021 is a wasteful number, since it uses less digits than its factorization.

1111421021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17491.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1111421021 is about 33337.9816575629. The cubic root of 1111421021 is about 1035.8404559078.

Adding to 1111421021 its reverse (1201241111), we get a palindrome (2312662132).

The spelling of 1111421021 in words is "one billion, one hundred eleven million, four hundred twenty-one thousand, twenty-one".