20121110011212 has 72 divisors (see below), whose sum is σ = 54616063299840. Its totient is φ = 5748717854880.

The previous prime is 20121110011157. The next prime is 20121110011267. The reversal of 20121110011212 is 21211001112102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20121110011157) and next prime (20121110011267).

It is a junction number, because it is equal to n+sod(n) for n = 20121110011191 and 20121110011200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20013489 + ... + 20994807.

It is an arithmetic number, because the mean of its divisors is an integer number (758556434720).

Almost surely, 2^{20121110011212} is an apocalyptic number.

It is an amenable number.

20121110011212 is an abundant number, since it is smaller than the sum of its proper divisors (34494953288628).

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

20121110011212 is a wasteful number, since it uses less digits than its factorization.

20121110011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016211 (or 1016202 counting only the distinct ones).

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

Adding to 20121110011212 its reverse (21211001112102), we get a palindrome (41332111123314).

The spelling of 20121110011212 in words is "twenty trillion, one hundred twenty-one billion, one hundred ten million, eleven thousand, two hundred twelve".