1213120213121 has 16 divisors (see below), whose sum is σ = 1247844799488. Its totient is φ = 1178644089600.

The previous prime is 1213120213117. The next prime is 1213120213133.

1213120213121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1213120213121 - 2² = 1213120213117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213120213093 and 1213120213102.

It is not an unprimeable number, because it can be changed into a prime (1213120213171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26454605 + ... + 26500421.

It is an arithmetic number, because the mean of its divisors is an integer number (77990299968).

Almost surely, 2^{1213120213121} is an apocalyptic number.

It is an amenable number.

1213120213121 is a deficient number, since it is larger than the sum of its proper divisors (34724586367).

1213120213121 is a wasteful number, since it uses less digits than its factorization.

1213120213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48512.

The product of its (nonzero) digits is 144, while the sum is 20.

It can be divided in two parts, 1213120 and 213121, that added together give a palindrome (1426241).

The spelling of 1213120213121 in words is "one trillion, two hundred thirteen billion, one hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".