1121021413 has 4 divisors (see below), whose sum is σ = 1180022560. Its totient is φ = 1062020268.

The previous prime is 1121021399. The next prime is 1121021431. The reversal of 1121021413 is 3141201211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121021413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121021453) 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, 29500545 + ... + 29500582.

It is an arithmetic number, because the mean of its divisors is an integer number (295005640).

Almost surely, 2^1121021413 is an apocalyptic number.

It is an amenable number.

1121021413 is a deficient number, since it is larger than the sum of its proper divisors (59001147).

1121021413 is an equidigital number, since it uses as much as digits as its factorization.

1121021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59001146.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1121021413 is about 33481.6578591921. The cubic root of 1121021413 is about 1038.8144197463.

Adding to 1121021413 its reverse (3141201211), we get a palindrome (4262222624).

It can be divided in two parts, 11210 and 21413, that added together give a palindrome (32623).

The spelling of 1121021413 in words is "one billion, one hundred twenty-one million, twenty-one thousand, four hundred thirteen".