40421421253 has 2 divisors, whose sum is σ = 40421421254. Its totient is φ = 40421421252.

The previous prime is 40421421221. The next prime is 40421421259. The reversal of 40421421253 is 35212412404.

40421421253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32370486724 + 8050934529 = 179918^2 + 89727^2 .

It is a cyclic number.

It is not a de Polignac number, because 40421421253 - 2⁵ = 40421421221 is a prime.

It is a super-2 number, since 2×40421421253² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40421421259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210710626 + 20210710627.

It is an arithmetic number, because the mean of its divisors is an integer number (20210710627).

Almost surely, 2^40421421253 is an apocalyptic number.

It is an amenable number.

40421421253 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421421253 is an equidigital number, since it uses as much as digits as its factorization.

40421421253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 40421421253 its reverse (35212412404), we get a palindrome (75633833657).

The spelling of 40421421253 in words is "forty billion, four hundred twenty-one million, four hundred twenty-one thousand, two hundred fifty-three".