1201132221 has 16 divisors (see below), whose sum is σ = 1656648000. Its totient is φ = 773497728.

The previous prime is 1201132217. The next prime is 1201132267. The reversal of 1201132221 is 1222311021.

It is not a de Polignac number, because 1201132221 - 2² = 1201132217 is a prime.

It is a super-2 number, since 2×1201132221² = 2885437224648785682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1201132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201130221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23496 + ... + 54353.

It is an arithmetic number, because the mean of its divisors is an integer number (103540500).

Almost surely, 2^1201132221 is an apocalyptic number.

It is an amenable number.

1201132221 is a deficient number, since it is larger than the sum of its proper divisors (455515779).

1201132221 is a wasteful number, since it uses less digits than its factorization.

1201132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78028.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1201132221 is about 34657.3545008848. The cubic root of 1201132221 is about 1062.9926764448.

Adding to 1201132221 its reverse (1222311021), we get a palindrome (2423443242).

The spelling of 1201132221 in words is "one billion, two hundred one million, one hundred thirty-two thousand, two hundred twenty-one".