20021012121212 has 12 divisors (see below), whose sum is σ = 35559708096360. Its totient is φ = 9861095522256.

The previous prime is 20021012121211. The next prime is 20021012121221. The reversal of 20021012121212 is 21212121012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021012121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37352634287 + ... + 37352634822.

It is an arithmetic number, because the mean of its divisors is an integer number (2963309008030).

Almost surely, 2^{20021012121212} is an apocalyptic number.

It is an amenable number.

20021012121212 is a deficient number, since it is larger than the sum of its proper divisors (15538695975148).

20021012121212 is a wasteful number, since it uses less digits than its factorization.

20021012121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74705269180 (or 74705269178 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021012121212 its reverse (21212121012002), we get a palindrome (41233133133214).

The spelling of 20021012121212 in words is "twenty trillion, twenty-one billion, twelve million, one hundred twenty-one thousand, two hundred twelve".