1201121211213 has 96 divisors (see below), whose sum is σ = 2234084696064. Its totient is φ = 603493200000.

The previous prime is 1201121211179. The next prime is 1201121211247. The reversal of 1201121211213 is 3121121211021.

It is a happy number.

1201121211213 is a `hidden beast` number, since 120 + 1 + 121 + 211 + 213 = 666.

It is an interprime number because it is at equal distance from previous prime (1201121211179) and next prime (1201121211247).

It is not a de Polignac number, because 1201121211213 - 2²⁰ = 1201120162637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121211413) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40824478 + ... + 40853888.

It is an arithmetic number, because the mean of its divisors is an integer number (23271715584).

Almost surely, 2^{1201121211213} is an apocalyptic number.

It is an amenable number.

1201121211213 is a deficient number, since it is larger than the sum of its proper divisors (1032963484851).

1201121211213 is a wasteful number, since it uses less digits than its factorization.

1201121211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31367 (or 31364 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1201121211213 its reverse (3121121211021), we get a palindrome (4322242422234).

The spelling of 1201121211213 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".