1321521541101 has 32 divisors (see below), whose sum is σ = 1964936597120. Its totient is φ = 877812671232.

The previous prime is 1321521541027. The next prime is 1321521541121. The reversal of 1321521541101 is 1011451251231.

1321521541101 is a `hidden beast` number, since 1 + 3 + 2 + 15 + 2 + 1 + 541 + 101 = 666.

It is not a de Polignac number, because 1321521541101 - 2⁷ = 1321521540973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321521541121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8775426 + ... + 8924748.

It is an arithmetic number, because the mean of its divisors is an integer number (61404268660).

Almost surely, 2^{1321521541101} is an apocalyptic number.

It is an amenable number.

1321521541101 is a deficient number, since it is larger than the sum of its proper divisors (643415056019).

1321521541101 is a wasteful number, since it uses less digits than its factorization.

1321521541101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150522 (or 150516 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

Adding to 1321521541101 its reverse (1011451251231), we get a palindrome (2332972792332).

The spelling of 1321521541101 in words is "one trillion, three hundred twenty-one billion, five hundred twenty-one million, five hundred forty-one thousand, one hundred one".