1201201022221 has 16 divisors (see below), whose sum is σ = 1221659074944. Its totient is φ = 1180933484544.

The previous prime is 1201201022213. The next prime is 1201201022233. The reversal of 1201201022221 is 1222201021021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201201022221 - 2³ = 1201201022213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201201022195 and 1201201022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201201122221) 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, 8938690 + ... + 9072076.

It is an arithmetic number, because the mean of its divisors is an integer number (76353692184).

Almost surely, 2^{1201201022221} is an apocalyptic number.

It is an amenable number.

1201201022221 is a deficient number, since it is larger than the sum of its proper divisors (20458052723).

1201201022221 is a wasteful number, since it uses less digits than its factorization.

1201201022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134100.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201201022221 its reverse (1222201021021), we get a palindrome (2423402043242).

The spelling of 1201201022221 in words is "one trillion, two hundred one billion, two hundred one million, twenty-two thousand, two hundred twenty-one".