1321210112011 has 16 divisors (see below), whose sum is σ = 1424087308800. Its totient is φ = 1221171269248.

The previous prime is 1321210112003. The next prime is 1321210112029. The reversal of 1321210112011 is 1102110121231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1321210112011 - 2³ = 1321210112003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321210112041) 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, 315930 + ... + 1655968.

It is an arithmetic number, because the mean of its divisors is an integer number (89005456800).

Almost surely, 2^{1321210112011} is an apocalyptic number.

1321210112011 is a deficient number, since it is larger than the sum of its proper divisors (102877196789).

1321210112011 is a wasteful number, since it uses less digits than its factorization.

1321210112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341098.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1321210112011 its reverse (1102110121231), we get a palindrome (2423320233242).

The spelling of 1321210112011 in words is "one trillion, three hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, eleven".