1121232411221 has 12 divisors (see below), whose sum is σ = 1243728152100. Its totient is φ = 1009740251520.

The previous prime is 1121232411209. The next prime is 1121232411251. The reversal of 1121232411221 is 1221142321211.

It can be written as a sum of positive squares in 6 ways, for example, as 399898140625 + 721334270596 = 632375^2 + 849314^2 .

It is not a de Polignac number, because 1121232411221 - 2³⁴ = 1104052542037 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 (1121232411251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80901746 + ... + 80915603.

It is an arithmetic number, because the mean of its divisors is an integer number (103644012675).

Almost surely, 2^{1121232411221} is an apocalyptic number.

It is an amenable number.

1121232411221 is a deficient number, since it is larger than the sum of its proper divisors (122495740879).

1121232411221 is a wasteful number, since it uses less digits than its factorization.

1121232411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161817416 (or 161817403 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

Adding to 1121232411221 its reverse (1221142321211), we get a palindrome (2342374732432).

The spelling of 1121232411221 in words is "one trillion, one hundred twenty-one billion, two hundred thirty-two million, four hundred eleven thousand, two hundred twenty-one".