2120121003 has 32 divisors (see below), whose sum is σ = 3795466752. Its totient is φ = 1016640000.

The previous prime is 2120120971. The next prime is 2120121011. The reversal of 2120121003 is 3001210212.

It is not a de Polignac number, because 2120121003 - 2⁵ = 2120120971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120121003.

It is not an unprimeable number, because it can be changed into a prime (2120125003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349998 + ... + 356003.

It is an arithmetic number, because the mean of its divisors is an integer number (118608336).

Almost surely, 2^2120121003 is an apocalyptic number.

2120121003 is a deficient number, since it is larger than the sum of its proper divisors (1675345749).

2120121003 is a wasteful number, since it uses less digits than its factorization.

2120121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706035.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2120121003 is about 46044.7717227483. The cubic root of 2120121003 is about 1284.6560981727.

Adding to 2120121003 its reverse (3001210212), we get a palindrome (5121331215).

The spelling of 2120121003 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, three".