39142207906621 has 2 divisors, whose sum is σ = 39142207906622. Its totient is φ = 39142207906620.

The previous prime is 39142207906619. The next prime is 39142207906651. The reversal of 39142207906621 is 12660970224193.

39142207906621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37058703307396 + 2083504599225 = 6087586^2 + 1443435^2 .

It is a cyclic number.

It is not a de Polignac number, because 39142207906621 - 2¹ = 39142207906619 is a prime.

It is a super-2 number, since 2×39142207906621² (a number of 28 digits) contains 22 as substring.

Together with 39142207906619, 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 (39142207906651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19571103953310 + 19571103953311.

It is an arithmetic number, because the mean of its divisors is an integer number (19571103953311).

Almost surely, 2^{39142207906621} is an apocalyptic number.

It is an amenable number.

39142207906621 is a deficient number, since it is larger than the sum of its proper divisors (1).

39142207906621 is an equidigital number, since it uses as much as digits as its factorization.

39142207906621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 39142207906621 in words is "thirty-nine trillion, one hundred forty-two billion, two hundred seven million, nine hundred six thousand, six hundred twenty-one".