1003220421 has 16 divisors (see below), whose sum is σ = 1529937024. Its totient is φ = 572811264.

The previous prime is 1003220399. The next prime is 1003220429. The reversal of 1003220421 is 1240223001.

It is not a de Polignac number, because 1003220421 - 2¹⁹ = 1002696133 is a prime.

It is a super-2 number, since 2×1003220421² = 2012902426222834482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1003220421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003220429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8821 + ... + 45653.

It is an arithmetic number, because the mean of its divisors is an integer number (95621064).

Almost surely, 2^1003220421 is an apocalyptic number.

It is an amenable number.

1003220421 is a deficient number, since it is larger than the sum of its proper divisors (526716603).

1003220421 is a wasteful number, since it uses less digits than its factorization.

1003220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38140.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1003220421 is about 31673.6549990682. The cubic root of 1003220421 is about 1001.0723233782.

Adding to 1003220421 its reverse (1240223001), we get a palindrome (2243443422).

The spelling of 1003220421 in words is "one billion, three million, two hundred twenty thousand, four hundred twenty-one".