1121021411 has 4 divisors (see below), whose sum is σ = 1157183424. Its totient is φ = 1084859400.

The previous prime is 1121021399. The next prime is 1121021431. The reversal of 1121021411 is 1141201211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1141201211 = 17 ⋅67129483.

It is a cyclic number.

It is not a de Polignac number, because 1121021411 - 2⁶ = 1121021347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121021431) 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, 18080960 + ... + 18081021.

It is an arithmetic number, because the mean of its divisors is an integer number (289295856).

Almost surely, 2^1121021411 is an apocalyptic number.

1121021411 is a deficient number, since it is larger than the sum of its proper divisors (36162013).

1121021411 is an equidigital number, since it uses as much as digits as its factorization.

1121021411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36162012.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1121021411 is about 33481.6578293250. The cubic root of 1121021411 is about 1038.8144191285.

Adding to 1121021411 its reverse (1141201211), we get a palindrome (2262222622).

The spelling of 1121021411 in words is "one billion, one hundred twenty-one million, twenty-one thousand, four hundred eleven".