1212120100012 has 48 divisors (see below), whose sum is σ = 2215342080000. Its totient is φ = 579580432704.

The previous prime is 1212120099979. The next prime is 1212120100019. The reversal of 1212120100012 is 2100010212121.

It is a junction number, because it is equal to n+sod(n) for n = 1212120099965 and 1212120100001.

It is not an unprimeable number, because it can be changed into a prime (1212120100019) 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, 8755789 + ... + 8893147.

It is an arithmetic number, because the mean of its divisors is an integer number (46152960000).

Almost surely, 2^{1212120100012} is an apocalyptic number.

It is an amenable number.

1212120100012 is a deficient number, since it is larger than the sum of its proper divisors (1003221979988).

1212120100012 is a wasteful number, since it uses less digits than its factorization.

1212120100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138118 (or 138116 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212120100012 its reverse (2100010212121), we get a palindrome (3312130312133).

The spelling of 1212120100012 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred thousand, twelve".