2003021221387 has 2 divisors, whose sum is σ = 2003021221388. Its totient is φ = 2003021221386.

The previous prime is 2003021221379. The next prime is 2003021221391. The reversal of 2003021221387 is 7831221203002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2003021221387 - 2³ = 2003021221379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2003021221687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001510610693 + 1001510610694.

It is an arithmetic number, because the mean of its divisors is an integer number (1001510610694).

Almost surely, 2^{2003021221387} is an apocalyptic number.

2003021221387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003021221387 is an equidigital number, since it uses as much as digits as its factorization.

2003021221387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 2003021221387 its reverse (7831221203002), we get a palindrome (9834242424389).

The spelling of 2003021221387 in words is "two trillion, three billion, twenty-one million, two hundred twenty-one thousand, three hundred eighty-seven".