2121232747 has 2 divisors, whose sum is σ = 2121232748. Its totient is φ = 2121232746.

The previous prime is 2121232733. The next prime is 2121232769. The reversal of 2121232747 is 7472321212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121232747 - 2¹⁵ = 2121199979 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2121232777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060616373 + 1060616374.

It is an arithmetic number, because the mean of its divisors is an integer number (1060616374).

Almost surely, 2^2121232747 is an apocalyptic number.

2121232747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121232747 is an equidigital number, since it uses as much as digits as its factorization.

2121232747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 31.

The square root of 2121232747 is about 46056.8425643791. The cubic root of 2121232747 is about 1284.8806072361.

Adding to 2121232747 its reverse (7472321212), we get a palindrome (9593553959).

The spelling of 2121232747 in words is "two billion, one hundred twenty-one million, two hundred thirty-two thousand, seven hundred forty-seven".