1121231101 has 2 divisors, whose sum is σ = 1121231102. Its totient is φ = 1121231100.

The previous prime is 1121231099. The next prime is 1121231113. The reversal of 1121231101 is 1011321211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1103967076 + 17264025 = 33226^2 + 4155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121231101 - 2¹ = 1121231099 is a prime.

Together with 1121231099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121231191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560615550 + 560615551.

It is an arithmetic number, because the mean of its divisors is an integer number (560615551).

Almost surely, 2^1121231101 is an apocalyptic number.

It is an amenable number.

1121231101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121231101 is an equidigital number, since it uses as much as digits as its factorization.

1121231101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1121231101 is about 33484.7890989327. The cubic root of 1121231101 is about 1038.8791860791.

Adding to 1121231101 its reverse (1011321211), we get a palindrome (2132552312).

The spelling of 1121231101 in words is "one billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred one".