1121420023 has 4 divisors (see below), whose sum is σ = 1131344208. Its totient is φ = 1111495840.

The previous prime is 1121419991. The next prime is 1121420029. The reversal of 1121420023 is 3200241211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121420023 - 2⁵ = 1121419991 is a prime.

It is a super-3 number, since 3×1121420023³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121419979 and 1121420006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121420029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4961923 + ... + 4962148.

It is an arithmetic number, because the mean of its divisors is an integer number (282836052).

Almost surely, 2^1121420023 is an apocalyptic number.

1121420023 is a deficient number, since it is larger than the sum of its proper divisors (9924185).

1121420023 is an equidigital number, since it uses as much as digits as its factorization.

1121420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924184.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1121420023 is about 33487.6099923539. The cubic root of 1121420023 is about 1038.9375315029.

Adding to 1121420023 its reverse (3200241211), we get a palindrome (4321661234).

The spelling of 1121420023 in words is "one billion, one hundred twenty-one million, four hundred twenty thousand, twenty-three".