1221055433101 has 8 divisors (see below), whose sum is σ = 1395628510464. Its totient is φ = 1046516502480.

The previous prime is 1221055433093. The next prime is 1221055433159. The reversal of 1221055433101 is 1013345501221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221055433101 - 2³ = 1221055433093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221055433101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221055433161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8460010 + ... + 8603131.

It is an arithmetic number, because the mean of its divisors is an integer number (174453563808).

Almost surely, 2^{1221055433101} is an apocalyptic number.

It is an amenable number.

1221055433101 is a deficient number, since it is larger than the sum of its proper divisors (174573077363).

1221055433101 is a wasteful number, since it uses less digits than its factorization.

1221055433101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073371.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 1221055433101 in words is "one trillion, two hundred twenty-one billion, fifty-five million, four hundred thirty-three thousand, one hundred one".