103213002121 has 4 divisors (see below), whose sum is σ = 103214198932. Its totient is φ = 103211805312.

The previous prime is 103213002119. The next prime is 103213002227. The reversal of 103213002121 is 121200312301.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23652902025 + 79560100096 = 153795^2 + 282064^2 .

It is a cyclic number.

It is not a de Polignac number, because 103213002121 - 2¹ = 103213002119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103213002095 and 103213002104.

It is not an unprimeable number, because it can be changed into a prime (103213009121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458076 + ... + 645181.

It is an arithmetic number, because the mean of its divisors is an integer number (25803549733).

Almost surely, 2^103213002121 is an apocalyptic number.

It is an amenable number.

103213002121 is a deficient number, since it is larger than the sum of its proper divisors (1196811).

103213002121 is an equidigital number, since it uses as much as digits as its factorization.

103213002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196810.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103213002121 its reverse (121200312301), we get a palindrome (224413314422).

The spelling of 103213002121 in words is "one hundred three billion, two hundred thirteen million, two thousand, one hundred twenty-one".