20221212111012 has 36 divisors (see below), whose sum is σ = 55761524307216. Its totient is φ = 6127640033520.

The previous prime is 20221212111011. The next prime is 20221212111013. The reversal of 20221212111012 is 21011121212202.

It is an interprime number because it is at equal distance from previous prime (20221212111011) and next prime (20221212111013).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20221212111011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25531833078 + ... + 25531833869.

It is an arithmetic number, because the mean of its divisors is an integer number (1548931230756).

Almost surely, 2^{20221212111012} is an apocalyptic number.

20221212111012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20221212111012 is an abundant number, since it is smaller than the sum of its proper divisors (35540312196204).

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

20221212111012 is a wasteful number, since it uses less digits than its factorization.

20221212111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51063666968 (or 51063666963 counting only the distinct ones).

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

Adding to 20221212111012 its reverse (21011121212202), we get a palindrome (41232333323214).

The spelling of 20221212111012 in words is "twenty trillion, two hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, twelve".