10203221987 has 4 divisors (see below), whose sum is σ = 11660825136. Its totient is φ = 8745618840.

The previous prime is 10203221909. The next prime is 10203222013. The reversal of 10203221987 is 78912230201.

10203221987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10203221987 - 2⁸ = 10203221731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10203221387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728801564 + ... + 728801577.

It is an arithmetic number, because the mean of its divisors is an integer number (2915206284).

Almost surely, 2^10203221987 is an apocalyptic number.

10203221987 is a deficient number, since it is larger than the sum of its proper divisors (1457603149).

10203221987 is an equidigital number, since it uses as much as digits as its factorization.

10203221987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457603148.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 10203221987 in words is "ten billion, two hundred three million, two hundred twenty-one thousand, nine hundred eighty-seven".