68002051244921 has 2 divisors, whose sum is σ = 68002051244922. Its totient is φ = 68002051244920.

The previous prime is 68002051244891. The next prime is 68002051244951. The reversal of 68002051244921 is 12944215020086.

It is a balanced prime because it is at equal distance from previous prime (68002051244891) and next prime (68002051244951).

It can be written as a sum of positive squares in only one way, i.e., 65777371605625 + 2224679639296 = 8110325^2 + 1491536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68002051244921 is a prime.

It is not a weakly prime, because it can be changed into another prime (68002051244951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34001025622460 + 34001025622461.

It is an arithmetic number, because the mean of its divisors is an integer number (34001025622461).

Almost surely, 2^{68002051244921} is an apocalyptic number.

It is an amenable number.

68002051244921 is a deficient number, since it is larger than the sum of its proper divisors (1).

68002051244921 is an equidigital number, since it uses as much as digits as its factorization.

68002051244921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 68002051244921 in words is "sixty-eight trillion, two billion, fifty-one million, two hundred forty-four thousand, nine hundred twenty-one".