2002125314821 has 2 divisors, whose sum is σ = 2002125314822. Its totient is φ = 2002125314820.

The previous prime is 2002125314803. The next prime is 2002125314843. The reversal of 2002125314821 is 1284135212002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1987646005921 + 14479308900 = 1409839^2 + 120330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002125314821 - 2²¹ = 2002123217669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002125314851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001062657410 + 1001062657411.

It is an arithmetic number, because the mean of its divisors is an integer number (1001062657411).

Almost surely, 2^{2002125314821} is an apocalyptic number.

It is an amenable number.

2002125314821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002125314821 is an equidigital number, since it uses as much as digits as its factorization.

2002125314821 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 31.

The spelling of 2002125314821 in words is "two trillion, two billion, one hundred twenty-five million, three hundred fourteen thousand, eight hundred twenty-one".