1011201232221 has 12 divisors (see below), whose sum is σ = 1500100326972. Its totient is φ = 655914312576.

The previous prime is 1011201232207. The next prime is 1011201232231. The reversal of 1011201232221 is 1222321021101.

1011201232221 is a `hidden beast` number, since 1 + 0 + 11 + 201 + 232 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 728267664996 + 282933567225 = 853386^2 + 531915^2 .

It is not a de Polignac number, because 1011201232221 - 2¹³ = 1011201224029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011201232194 and 1011201232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011201232201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1518319836 + ... + 1518320501.

It is an arithmetic number, because the mean of its divisors is an integer number (125008360581).

Almost surely, 2^{1011201232221} is an apocalyptic number.

It is an amenable number.

1011201232221 is a deficient number, since it is larger than the sum of its proper divisors (488899094751).

1011201232221 is a wasteful number, since it uses less digits than its factorization.

1011201232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036640380 (or 3036640377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1011201232221 its reverse (1222321021101), we get a palindrome (2233522253322).

The spelling of 1011201232221 in words is "one trillion, eleven billion, two hundred one million, two hundred thirty-two thousand, two hundred twenty-one".