1321210103221 has 4 divisors (see below), whose sum is σ = 1321212402112. Its totient is φ = 1321207804332.

The previous prime is 1321210103197. The next prime is 1321210103231. The reversal of 1321210103221 is 1223010121231.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1321210103221 - 2²⁹ = 1320673232309 is a prime.

It is a super-2 number, since 2×1321210103221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321210103231) 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, 569170 + ... + 1722316.

It is an arithmetic number, because the mean of its divisors is an integer number (330303100528).

Almost surely, 2^{1321210103221} is an apocalyptic number.

It is an amenable number.

1321210103221 is a deficient number, since it is larger than the sum of its proper divisors (2298891).

1321210103221 is a wasteful number, since it uses less digits than its factorization.

1321210103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298890.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321210103221 its reverse (1223010121231), we get a palindrome (2544220224452).

The spelling of 1321210103221 in words is "one trillion, three hundred twenty-one billion, two hundred ten million, one hundred three thousand, two hundred twenty-one".