1310221330121 has 16 divisors (see below), whose sum is σ = 1464406812288. Its totient is φ = 1162227494400.

The previous prime is 1310221330111. The next prime is 1310221330129. The reversal of 1310221330121 is 1210331220131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1310221330121 - 2⁶ = 1310221330057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310221330093 and 1310221330102.

It is not an unprimeable number, because it can be changed into a prime (1310221330129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8571770 + ... + 8723283.

It is an arithmetic number, because the mean of its divisors is an integer number (91525425768).

Almost surely, 2^{1310221330121} is an apocalyptic number.

1310221330121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1310221330121 is a deficient number, since it is larger than the sum of its proper divisors (154185482167).

1310221330121 is a wasteful number, since it uses less digits than its factorization.

1310221330121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17295232.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1310221330121 its reverse (1210331220131), we get a palindrome (2520552550252).

The spelling of 1310221330121 in words is "one trillion, three hundred ten billion, two hundred twenty-one million, three hundred thirty thousand, one hundred twenty-one".