2121031003 has 24 divisors (see below), whose sum is σ = 2684586912. Its totient is φ = 1660829184.

The previous prime is 2121030979. The next prime is 2121031049. The reversal of 2121031003 is 3001301212.

It is a de Polignac number, because none of the positive numbers 2^k-2121031003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (2121031063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44626 + ... + 78952.

It is an arithmetic number, because the mean of its divisors is an integer number (111857788).

Almost surely, 2^2121031003 is an apocalyptic number.

2121031003 is a deficient number, since it is larger than the sum of its proper divisors (563555909).

2121031003 is a wasteful number, since it uses less digits than its factorization.

2121031003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34451 (or 34444 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2121031003 is about 46054.6523491384. The cubic root of 2121031003 is about 1284.8398722481.

Adding to 2121031003 its reverse (3001301212), we get a palindrome (5122332215).

The spelling of 2121031003 in words is "two billion, one hundred twenty-one million, thirty-one thousand, three".