1201311032121 has 48 divisors (see below), whose sum is σ = 1848606489600. Its totient is φ = 750306582144.

The previous prime is 1201311032107. The next prime is 1201311032123. The reversal of 1201311032121 is 1212301131021.

1201311032121 is a `hidden beast` number, since 1 + 201 + 311 + 0 + 32 + 121 = 666.

It is not a de Polignac number, because 1201311032121 - 2¹⁰ = 1201311031097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201311032094 and 1201311032103.

It is not an unprimeable number, because it can be changed into a prime (1201311032123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3374640 + ... + 3713598.

It is an arithmetic number, because the mean of its divisors is an integer number (38512635200).

Almost surely, 2^{1201311032121} is an apocalyptic number.

It is an amenable number.

1201311032121 is a deficient number, since it is larger than the sum of its proper divisors (647295457479).

1201311032121 is a wasteful number, since it uses less digits than its factorization.

1201311032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339398 (or 339395 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1201311032121 its reverse (1212301131021), we get a palindrome (2413612163142).

The spelling of 1201311032121 in words is "one trillion, two hundred one billion, three hundred eleven million, thirty-two thousand, one hundred twenty-one".