1002221078 has 4 divisors (see below), whose sum is σ = 1503331620. Its totient is φ = 501110538.

The previous prime is 1002221071. The next prime is 1002221089. The reversal of 1002221078 is 8701222001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002221071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250555268 + ... + 250555271.

It is an arithmetic number, because the mean of its divisors is an integer number (375832905).

Almost surely, 2^1002221078 is an apocalyptic number.

1002221078 is a deficient number, since it is larger than the sum of its proper divisors (501110542).

1002221078 is an equidigital number, since it uses as much as digits as its factorization.

1002221078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501110541.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1002221078 is about 31657.8754498782. The cubic root of 1002221078 is about 1000.7398118767.

Adding to 1002221078 its reverse (8701222001), we get a palindrome (9703443079).

The spelling of 1002221078 in words is "one billion, two million, two hundred twenty-one thousand, seventy-eight".