40122143403521 has 2 divisors, whose sum is σ = 40122143403522. Its totient is φ = 40122143403520.

The previous prime is 40122143403493. The next prime is 40122143403533. The reversal of 40122143403521 is 12530434122104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33152675402896 + 6969468000625 = 5757836^2 + 2639975^2 .

It is a cyclic number.

It is not a de Polignac number, because 40122143403521 - 2⁶ = 40122143403457 is a prime.

It is not a weakly prime, because it can be changed into another prime (40122143403721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20061071701760 + 20061071701761.

It is an arithmetic number, because the mean of its divisors is an integer number (20061071701761).

Almost surely, 2^{40122143403521} is an apocalyptic number.

It is an amenable number.

40122143403521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40122143403521 is an equidigital number, since it uses as much as digits as its factorization.

40122143403521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 40122143403521 its reverse (12530434122104), we get a palindrome (52652577525625).

The spelling of 40122143403521 in words is "forty trillion, one hundred twenty-two billion, one hundred forty-three million, four hundred three thousand, five hundred twenty-one".