201201321123 has 24 divisors (see below), whose sum is σ = 333731062080. Its totient is φ = 115522288560.

The previous prime is 201201321119. The next prime is 201201321137. The reversal of 201201321123 is 321123102102.

201201321123 is a `hidden beast` number, since 20 + 1 + 201 + 321 + 123 = 666.

It is not a de Polignac number, because 201201321123 - 2² = 201201321119 is a prime.

It is a super-2 number, since 2×201201321123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201201321096 and 201201321105.

It is not an unprimeable number, because it can be changed into a prime (201201321173) 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, 53480661 + ... + 53484422.

It is an arithmetic number, because the mean of its divisors is an integer number (13905460920).

Almost surely, 2^201201321123 is an apocalyptic number.

201201321123 is a deficient number, since it is larger than the sum of its proper divisors (132529740957).

201201321123 is a wasteful number, since it uses less digits than its factorization.

201201321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106965119 (or 106965116 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201201321123 its reverse (321123102102), we get a palindrome (522324423225).

It can be divided in two parts, 2012013 and 21123, that added together give a triangular number (2033136 = T₂₀₁₆).

The spelling of 201201321123 in words is "two hundred one billion, two hundred one million, three hundred twenty-one thousand, one hundred twenty-three".