40351212514621 has 2 divisors, whose sum is σ = 40351212514622. Its totient is φ = 40351212514620.

The previous prime is 40351212514589. The next prime is 40351212514637. The reversal of 40351212514621 is 12641521215304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39927372453721 + 423840060900 = 6318811^2 + 651030^2 .

It is a cyclic number.

It is not a de Polignac number, because 40351212514621 - 2⁵ = 40351212514589 is a prime.

It is a super-2 number, since 2×40351212514621² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40351212514681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20175606257310 + 20175606257311.

It is an arithmetic number, because the mean of its divisors is an integer number (20175606257311).

Almost surely, 2^{40351212514621} is an apocalyptic number.

It is an amenable number.

40351212514621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40351212514621 is an equidigital number, since it uses as much as digits as its factorization.

40351212514621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 40351212514621 its reverse (12641521215304), we get a palindrome (52992733729925).

The spelling of 40351212514621 in words is "forty trillion, three hundred fifty-one billion, two hundred twelve million, five hundred fourteen thousand, six hundred twenty-one".