40221403021951 has 2 divisors, whose sum is σ = 40221403021952. Its totient is φ = 40221403021950.

The previous prime is 40221403021949. The next prime is 40221403022027. The reversal of 40221403021951 is 15912030412204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40221403021951 - 2¹ = 40221403021949 is a prime.

It is a super-2 number, since 2×40221403021951² (a number of 28 digits) contains 22 as substring.

Together with 40221403021949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40221403021901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110701510975 + 20110701510976.

It is an arithmetic number, because the mean of its divisors is an integer number (20110701510976).

Almost surely, 2^{40221403021951} is an apocalyptic number.

40221403021951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221403021951 is an equidigital number, since it uses as much as digits as its factorization.

40221403021951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 40221403021951 in words is "forty trillion, two hundred twenty-one billion, four hundred three million, twenty-one thousand, nine hundred fifty-one".