43132402121 has 2 divisors, whose sum is σ = 43132402122. Its totient is φ = 43132402120.

The previous prime is 43132402069. The next prime is 43132402139. The reversal of 43132402121 is 12120423134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29056952521 + 14075449600 = 170461^2 + 118640^2 .

It is a cyclic number.

It is not a de Polignac number, because 43132402121 - 2¹⁸ = 43132139977 is a prime.

It is a super-2 number, since 2×43132402121² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43132402321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21566201060 + 21566201061.

It is an arithmetic number, because the mean of its divisors is an integer number (21566201061).

Almost surely, 2^43132402121 is an apocalyptic number.

It is an amenable number.

43132402121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43132402121 is an equidigital number, since it uses as much as digits as its factorization.

43132402121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 43132402121 its reverse (12120423134), we get a palindrome (55252825255).

The spelling of 43132402121 in words is "forty-three billion, one hundred thirty-two million, four hundred two thousand, one hundred twenty-one".