1121051421 has 20 divisors (see below), whose sum is σ = 1913894752. Its totient is φ = 640600488.

The previous prime is 1121051401. The next prime is 1121051423. The reversal of 1121051421 is 1241501211.

It is not a de Polignac number, because 1121051421 - 2¹⁵ = 1121018653 is a prime.

It is a super-2 number, since 2×1121051421² = 2513512577052238482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121051394 and 1121051403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121051423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 988015 + ... + 989148.

Almost surely, 2^1121051421 is an apocalyptic number.

It is an amenable number.

1121051421 is a deficient number, since it is larger than the sum of its proper divisors (792843331).

1121051421 is an equidigital number, since it uses as much as digits as its factorization.

1121051421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977182 (or 1977173 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1121051421 is about 33482.1059821511. The cubic root of 1121051421 is about 1038.8236888125.

Adding to 1121051421 its reverse (1241501211), we get a palindrome (2362552632).

It can be divided in two parts, 112105 and 1421, that added together give a triangular number (113526 = T₄₇₆).

The spelling of 1121051421 in words is "one billion, one hundred twenty-one million, fifty-one thousand, four hundred twenty-one".