43011021197 has 2 divisors, whose sum is σ = 43011021198. Its totient is φ = 43011021196.

The previous prime is 43011021143. The next prime is 43011021239. The reversal of 43011021197 is 79112011034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42854796196 + 156225001 = 207014^2 + 12499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43011021197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43011024197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505510598 + 21505510599.

It is an arithmetic number, because the mean of its divisors is an integer number (21505510599).

Almost surely, 2^43011021197 is an apocalyptic number.

It is an amenable number.

43011021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

43011021197 is an equidigital number, since it uses as much as digits as its factorization.

43011021197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 43011021197 in words is "forty-three billion, eleven million, twenty-one thousand, one hundred ninety-seven".