1212121000012 has 24 divisors (see below), whose sum is σ = 2383702838496. Its totient is φ = 535116962688.

The previous prime is 1212121000009. The next prime is 1212121000021. The reversal of 1212121000012 is 2100001212121.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1212120999956 and 1212121000001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506738353 + ... + 506740744.

It is an arithmetic number, because the mean of its divisors is an integer number (99320951604).

Almost surely, 2^{1212121000012} is an apocalyptic number.

It is an amenable number.

1212121000012 is a deficient number, since it is larger than the sum of its proper divisors (1171581838484).

1212121000012 is a wasteful number, since it uses less digits than its factorization.

1212121000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013479137 (or 1013479135 counting only the distinct ones).

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

Adding to 1212121000012 its reverse (2100001212121), we get a palindrome (3312122212133).

It can be divided in two parts, 12121 and 21000012, that multiplied together give a palindrome (254541145452).

The spelling of 1212121000012 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, twelve", and thus it is an aban number.