1201101331221 has 24 divisors (see below), whose sum is σ = 1892980562304. Its totient is φ = 727810954560.

The previous prime is 1201101331159. The next prime is 1201101331229. The reversal of 1201101331221 is 1221331011021.

1201101331221 is a `hidden beast` number, since 1 + 2 + 0 + 110 + 1 + 331 + 221 = 666.

It is not a de Polignac number, because 1201101331221 - 2²⁶ = 1201034222357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201101331194 and 1201101331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201101331229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515176 + ... + 1633281.

It is an arithmetic number, because the mean of its divisors is an integer number (78874190096).

Almost surely, 2^{1201101331221} is an apocalyptic number.

1201101331221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201101331221 is a deficient number, since it is larger than the sum of its proper divisors (691879231083).

1201101331221 is a wasteful number, since it uses less digits than its factorization.

1201101331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154121 (or 2154118 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1201101331221 its reverse (1221331011021), we get a palindrome (2422432342242).

The spelling of 1201101331221 in words is "one trillion, two hundred one billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-one".