1213202023121 has 12 divisors (see below), whose sum is σ = 1403704822800. Its totient is φ = 1044862984440.

The previous prime is 1213202023063. The next prime is 1213202023129.

1213202023121 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1213202023121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213202023093 and 1213202023102.

It is not an unprimeable number, because it can be changed into a prime (1213202023129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263851991 + ... + 263856588.

It is an arithmetic number, because the mean of its divisors is an integer number (116975401900).

Almost surely, 2^{1213202023121} is an apocalyptic number.

1213202023121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213202023121 is a deficient number, since it is larger than the sum of its proper divisors (190502799679).

1213202023121 is a wasteful number, since it uses less digits than its factorization.

1213202023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527708620 (or 527708609 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The spelling of 1213202023121 in words is "one trillion, two hundred thirteen billion, two hundred two million, twenty-three thousand, one hundred twenty-one".