1231200001101 has 16 divisors (see below), whose sum is σ = 1876703066624. Its totient is φ = 703322065584.

The previous prime is 1231200001093. The next prime is 1231200001123. The reversal of 1231200001101 is 1011000021321.

It is not a de Polignac number, because 1231200001101 - 2³ = 1231200001093 is a prime.

It is a super-2 number, since 2×1231200001101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231200001301) 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, 9131155 + ... + 9265008.

It is an arithmetic number, because the mean of its divisors is an integer number (117293941664).

Almost surely, 2^{1231200001101} is an apocalyptic number.

It is an amenable number.

1231200001101 is a deficient number, since it is larger than the sum of its proper divisors (645503065523).

1231200001101 is a wasteful number, since it uses less digits than its factorization.

1231200001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18399360.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 1231200001101 its reverse (1011000021321), we get a palindrome (2242200022422).

The spelling of 1231200001101 in words is "one trillion, two hundred thirty-one billion, two hundred million, one thousand, one hundred one".