1212201212121 has 48 divisors (see below), whose sum is σ = 1846409700096. Its totient is φ = 764835337728.

The previous prime is 1212201212093. The next prime is 1212201212141. The reversal of 1212201212121 is 1212121022121.

It is not a de Polignac number, because 1212201212121 - 2⁹ = 1212201211609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212201212094 and 1212201212103.

It is not an unprimeable number, because it can be changed into a prime (1212201212141) 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, 25412125 + ... + 25459781.

It is an arithmetic number, because the mean of its divisors is an integer number (38466868752).

Almost surely, 2^{1212201212121} is an apocalyptic number.

It is an amenable number.

1212201212121 is a deficient number, since it is larger than the sum of its proper divisors (634208487975).

1212201212121 is a wasteful number, since it uses less digits than its factorization.

1212201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48982 (or 48979 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212201212121 its reverse (1212121022121), we get a palindrome (2424322234242).

The spelling of 1212201212121 in words is "one trillion, two hundred twelve billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".