1201332111 has 16 divisors (see below), whose sum is σ = 1835712000. Its totient is φ = 684559008.

The previous prime is 1201332107. The next prime is 1201332137. The reversal of 1201332111 is 1112331021.

It is a happy number.

It is not a de Polignac number, because 1201332111 - 2² = 1201332107 is a prime.

It is a super-3 number, since 3×1201332111³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201332101) 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, 72136 + ... + 87213.

It is an arithmetic number, because the mean of its divisors is an integer number (114732000).

Almost surely, 2^1201332111 is an apocalyptic number.

1201332111 is a deficient number, since it is larger than the sum of its proper divisors (634379889).

1201332111 is a wasteful number, since it uses less digits than its factorization.

1201332111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159718.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1201332111 is about 34660.2381844095. The cubic root of 1201332111 is about 1063.0516402060.

Adding to 1201332111 its reverse (1112331021), we get a palindrome (2313663132).

The spelling of 1201332111 in words is "one billion, two hundred one million, three hundred thirty-two thousand, one hundred eleven".