1212111021012 has 24 divisors (see below), whose sum is σ = 2828709799776. Its totient is φ = 403972614048.

The previous prime is 1212111021001. The next prime is 1212111021019. The reversal of 1212111021012 is 2101201112121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1212111020982 and 1212111021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111021019) 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, 7970658 + ... + 8121305.

It is an arithmetic number, because the mean of its divisors is an integer number (117862908324).

Almost surely, 2^{1212111021012} is an apocalyptic number.

1212111021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212111021012 is an abundant number, since it is smaller than the sum of its proper divisors (1616598778764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212111021012 is a wasteful number, since it uses less digits than its factorization.

1212111021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16098247 (or 16098245 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212111021012 its reverse (2101201112121), we get a palindrome (3313312133133).

The spelling of 1212111021012 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, twelve".