20111212001212 has 12 divisors (see below), whose sum is σ = 35197205326920. Its totient is φ = 10054867622096.

The previous prime is 20111212001191. The next prime is 20111212001297. The reversal of 20111212001212 is 21210021211102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184533343 + ... + 184642294.

It is an arithmetic number, because the mean of its divisors is an integer number (2933100443910).

Almost surely, 2^{20111212001212} is an apocalyptic number.

It is an amenable number.

20111212001212 is a deficient number, since it is larger than the sum of its proper divisors (15085993325708).

20111212001212 is a wasteful number, since it uses less digits than its factorization.

20111212001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369189260 (or 369189258 counting only the distinct ones).

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

Adding to 20111212001212 its reverse (21210021211102), we get a palindrome (41321233212314).

The spelling of 20111212001212 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, one thousand, two hundred twelve".