1121021011403 has 4 divisors (see below), whose sum is σ = 1136377463688. Its totient is φ = 1105664559120.

The previous prime is 1121021011399. The next prime is 1121021011417. The reversal of 1121021011403 is 3041101201211.

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 1121021011403 - 2² = 1121021011399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121021011423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7678226033 + ... + 7678226178.

It is an arithmetic number, because the mean of its divisors is an integer number (284094365922).

Almost surely, 2^{1121021011403} is an apocalyptic number.

1121021011403 is a deficient number, since it is larger than the sum of its proper divisors (15356452285).

1121021011403 is an equidigital number, since it uses as much as digits as its factorization.

1121021011403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15356452284.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1121021011403 its reverse (3041101201211), we get a palindrome (4162122212614).

The spelling of 1121021011403 in words is "one trillion, one hundred twenty-one billion, twenty-one million, eleven thousand, four hundred three".