1121021021 has 8 divisors (see below), whose sum is σ = 1187270784. Its totient is φ = 1054805440.

The previous prime is 1121020993. The next prime is 1121021093. The reversal of 1121021021 is 1201201211.

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 1121021021 - 2¹⁴ = 1121004637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121020993 and 1121021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121021621) 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, 94766 + ... + 105936.

It is an arithmetic number, because the mean of its divisors is an integer number (148408848).

Almost surely, 2^1121021021 is an apocalyptic number.

It is an amenable number.

1121021021 is a deficient number, since it is larger than the sum of its proper divisors (66249763).

1121021021 is a wasteful number, since it uses less digits than its factorization.

1121021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17091.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1121021021 is about 33481.6520052401. The cubic root of 1121021021 is about 1038.8142986617.

Adding to 1121021021 its reverse (1201201211), we get a palindrome (2322222232).

The spelling of 1121021021 in words is "one billion, one hundred twenty-one million, twenty-one thousand, twenty-one".