20121101121212 has 72 divisors (see below), whose sum is σ = 44638702470432. Its totient is φ = 7765849728000.

The previous prime is 20121101121179. The next prime is 20121101121227. The reversal of 20121101121212 is 21212110112102.

It is a congruent number.

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, 51661289 + ... + 52049312.

It is an arithmetic number, because the mean of its divisors is an integer number (619981978756).

Almost surely, 2^{20121101121212} is an apocalyptic number.

It is an amenable number.

20121101121212 is an abundant number, since it is smaller than the sum of its proper divisors (24517601349220).

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

20121101121212 is a wasteful number, since it uses less digits than its factorization.

20121101121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103710679 (or 103710664 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20121101121212 its reverse (21212110112102), we get a palindrome (41333211233314).

The spelling of 20121101121212 in words is "twenty trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty-one thousand, two hundred twelve".