1121202221121 has 12 divisors (see below), whose sum is σ = 1663284977172. Its totient is φ = 727266305376.

The previous prime is 1121202221119. The next prime is 1121202221207. The reversal of 1121202221121 is 1211222021211.

1121202221121 is a `hidden beast` number, since 1 + 121 + 202 + 221 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 557171180721 + 564031040400 = 746439^2 + 751020^2 .

It is not a de Polignac number, because 1121202221121 - 2¹ = 1121202221119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121202221094 and 1121202221103.

It is not an unprimeable number, because it can be changed into a prime (1121202221221) 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, 1683486486 + ... + 1683487151.

It is an arithmetic number, because the mean of its divisors is an integer number (138607081431).

Almost surely, 2^{1121202221121} is an apocalyptic number.

It is an amenable number.

1121202221121 is a deficient number, since it is larger than the sum of its proper divisors (542082756051).

1121202221121 is a wasteful number, since it uses less digits than its factorization.

1121202221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366973680 (or 3366973677 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121202221121 its reverse (1211222021211), we get a palindrome (2332424242332).

The spelling of 1121202221121 in words is "one trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".