1121421311 has 16 divisors (see below), whose sum is σ = 1174238208. Its totient is φ = 1069752000.

The previous prime is 1121421283. The next prime is 1121421331. The reversal of 1121421311 is 1131241211.

It is a cyclic number.

It is not a de Polignac number, because 1121421311 - 2¹⁴ = 1121404927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121421311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121421331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772136 + ... + 773586.

It is an arithmetic number, because the mean of its divisors is an integer number (73389888).

Almost surely, 2^1121421311 is an apocalyptic number.

1121421311 is a deficient number, since it is larger than the sum of its proper divisors (52816897).

1121421311 is a wasteful number, since it uses less digits than its factorization.

1121421311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822.

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

The square root of 1121421311 is about 33487.6292233416. The cubic root of 1121421311 is about 1038.9379292579.

Adding to 1121421311 its reverse (1131241211), we get a palindrome (2252662522).

The spelling of 1121421311 in words is "one billion, one hundred twenty-one million, four hundred twenty-one thousand, three hundred eleven".