1321121111101 has 16 divisors (see below), whose sum is σ = 1493304361920. Its totient is φ = 1158386245120.

The previous prime is 1321121111087. The next prime is 1321121111131. The reversal of 1321121111101 is 1011111211231.

It is a cyclic number.

It is not a de Polignac number, because 1321121111101 - 2⁵ = 1321121111069 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 (1321121111131) 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, 19169620 + ... + 19238413.

It is an arithmetic number, because the mean of its divisors is an integer number (93331522620).

Almost surely, 2^{1321121111101} is an apocalyptic number.

1321121111101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321121111101 is a deficient number, since it is larger than the sum of its proper divisors (172183250819).

1321121111101 is a wasteful number, since it uses less digits than its factorization.

1321121111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38408156.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1321121111101 its reverse (1011111211231), we get a palindrome (2332232322332).

The spelling of 1321121111101 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred one".