1212323103021 has 4 divisors (see below), whose sum is σ = 1616430804032. Its totient is φ = 808215402012.

The previous prime is 1212323102981. The next prime is 1212323103029. The reversal of 1212323103021 is 1203013232121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1212323103021 - 2³⁰ = 1211249361197 is a prime.

It is a super-2 number, since 2×1212323103021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212323103029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202053850501 + ... + 202053850506.

It is an arithmetic number, because the mean of its divisors is an integer number (404107701008).

Almost surely, 2^{1212323103021} is an apocalyptic number.

It is an amenable number.

1212323103021 is a deficient number, since it is larger than the sum of its proper divisors (404107701011).

1212323103021 is an equidigital number, since it uses as much as digits as its factorization.

1212323103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404107701010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1212323103021 its reverse (1203013232121), we get a palindrome (2415336335142).

The spelling of 1212323103021 in words is "one trillion, two hundred twelve billion, three hundred twenty-three million, one hundred three thousand, twenty-one".