1221113003 has 12 divisors (see below), whose sum is σ = 1343902224. Its totient is φ = 1108707600.

The previous prime is 1221112993. The next prime is 1221113017. The reversal of 1221113003 is 3003111221.

It is not a de Polignac number, because 1221113003 - 2¹⁴ = 1221096619 is a prime.

It is a super-2 number, since 2×1221113003² = 2982233932191356018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221113083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97298 + ... + 109128.

It is an arithmetic number, because the mean of its divisors is an integer number (111991852).

Almost surely, 2^1221113003 is an apocalyptic number.

1221113003 is a deficient number, since it is larger than the sum of its proper divisors (122789221).

1221113003 is a wasteful number, since it uses less digits than its factorization.

1221113003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12706 (or 12695 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1221113003 is about 34944.4273525837. The cubic root of 1221113003 is about 1068.8545704003.

Adding to 1221113003 its reverse (3003111221), we get a palindrome (4224224224).

The spelling of 1221113003 in words is "one billion, two hundred twenty-one million, one hundred thirteen thousand, three".