1213400043121 has 8 divisors (see below), whose sum is σ = 1387088501184. Its totient is φ = 1039797983760.

The previous prime is 1213400043103. The next prime is 1213400043181.

1213400043121 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213400043121 - 2¹³ = 1213400034929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213400043092 and 1213400043101.

It is not an unprimeable number, because it can be changed into a prime (1213400043101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21569575 + ... + 21625756.

It is an arithmetic number, because the mean of its divisors is an integer number (173386062648).

Almost surely, 2^{1213400043121} is an apocalyptic number.

It is an amenable number.

1213400043121 is a deficient number, since it is larger than the sum of its proper divisors (173688458063).

1213400043121 is an equidigital number, since it uses as much as digits as its factorization.

1213400043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43199351.

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 12134000 and 43121, that added together give a palindrome (12177121).

The spelling of 1213400043121 in words is "one trillion, two hundred thirteen billion, four hundred million, forty-three thousand, one hundred twenty-one".