2971135421 has 2 divisors, whose sum is σ = 2971135422. Its totient is φ = 2971135420.

The previous prime is 2971135403. The next prime is 2971135481. The reversal of 2971135421 is 1245311792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2622566521 + 348568900 = 51211^2 + 18670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2971135421 - 2¹⁸ = 2970873277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2971135481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1485567710 + 1485567711.

It is an arithmetic number, because the mean of its divisors is an integer number (1485567711).

Almost surely, 2^2971135421 is an apocalyptic number.

It is an amenable number.

2971135421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2971135421 is an equidigital number, since it uses as much as digits as its factorization.

2971135421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 2971135421 is about 54508.1225231616. The cubic root of 2971135421 is about 1437.6091081493.

The spelling of 2971135421 in words is "two billion, nine hundred seventy-one million, one hundred thirty-five thousand, four hundred twenty-one".