1201203123231 has 16 divisors (see below), whose sum is σ = 1602664449120. Its totient is φ = 800272112640.

The previous prime is 1201203123187. The next prime is 1201203123259. The reversal of 1201203123231 is 1323213021021.

It is not a de Polignac number, because 1201203123231 - 2⁹ = 1201203122719 is a prime.

It is a super-2 number, since 2×1201203123231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201203123198 and 1201203123207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201203121231) 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, 33156055 + ... + 33192263.

It is an arithmetic number, because the mean of its divisors is an integer number (100166528070).

Almost surely, 2^{1201203123231} is an apocalyptic number.

1201203123231 is a deficient number, since it is larger than the sum of its proper divisors (401461325889).

1201203123231 is a wasteful number, since it uses less digits than its factorization.

1201203123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43226.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1201203123231 its reverse (1323213021021), we get a palindrome (2524416144252).

The spelling of 1201203123231 in words is "one trillion, two hundred one billion, two hundred three million, one hundred twenty-three thousand, two hundred thirty-one".