1213030211121 has 48 divisors (see below), whose sum is σ = 1800059189760. Its totient is φ = 786883144320.

The previous prime is 1213030211051. The next prime is 1213030211161. The reversal of 1213030211121 is 1211120303121.

It is not a de Polignac number, because 1213030211121 - 2¹⁴ = 1213030194737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213030211094 and 1213030211103.

It is not an unprimeable number, because it can be changed into a prime (1213030211161) 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, 238924035 + ... + 238929111.

It is an arithmetic number, because the mean of its divisors is an integer number (37501233120).

Almost surely, 2^{1213030211121} is an apocalyptic number.

It is an amenable number.

1213030211121 is a deficient number, since it is larger than the sum of its proper divisors (587028978639).

1213030211121 is a wasteful number, since it uses less digits than its factorization.

1213030211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966 (or 9963 counting only the distinct ones).

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

Adding to 1213030211121 its reverse (1211120303121), we get a palindrome (2424150514242).

The spelling of 1213030211121 in words is "one trillion, two hundred thirteen billion, thirty million, two hundred eleven thousand, one hundred twenty-one".