12103211333021 has 4 divisors (see below), whose sum is σ = 12117012030972. Its totient is φ = 12089410635072.

The previous prime is 12103211333011. The next prime is 12103211333027. The reversal of 12103211333021 is 12033311230121.

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 5598008052121 + 6505203280900 = 2366011^2 + 2550530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12103211333021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103211333027) 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, 6900347660 + ... + 6900349413.

It is an arithmetic number, because the mean of its divisors is an integer number (3029253007743).

Almost surely, 2^{12103211333021} is an apocalyptic number.

It is an amenable number.

12103211333021 is a deficient number, since it is larger than the sum of its proper divisors (13800697951).

12103211333021 is an equidigital number, since it uses as much as digits as its factorization.

12103211333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800697950.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 12103211333021 its reverse (12033311230121), we get a palindrome (24136522563142).

The spelling of 12103211333021 in words is "twelve trillion, one hundred three billion, two hundred eleven million, three hundred thirty-three thousand, twenty-one".