1212111022012 has 48 divisors (see below), whose sum is σ = 2475752791680. Its totient is φ = 513404913600.

The previous prime is 1212111022009. The next prime is 1212111022013. The reversal of 1212111022012 is 2102201112121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111022013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11833378 + ... + 11935369.

It is an arithmetic number, because the mean of its divisors is an integer number (51578183160).

Almost surely, 2^{1212111022012} is an apocalyptic number.

It is an amenable number.

1212111022012 is an abundant number, since it is smaller than the sum of its proper divisors (1263641769668).

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

1212111022012 is a wasteful number, since it uses less digits than its factorization.

1212111022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23768842 (or 23768840 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212111022012 its reverse (2102201112121), we get a palindrome (3314312134133).

The spelling of 1212111022012 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twenty-two thousand, twelve".