20121101212 has 24 divisors (see below), whose sum is σ = 35571271680. Its totient is φ = 9958386480.

The previous prime is 20121101197. The next prime is 20121101237. The reversal of 20121101212 is 21210112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121101192 and 20121101201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96637 + ... + 222667.

It is an arithmetic number, because the mean of its divisors is an integer number (1482136320).

Almost surely, 2^20121101212 is an apocalyptic number.

It is an amenable number.

20121101212 is a deficient number, since it is larger than the sum of its proper divisors (15450170468).

20121101212 is a wasteful number, since it uses less digits than its factorization.

20121101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126441 (or 126439 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121101212 its reverse (21210112102), we get a palindrome (41331213314).

The spelling of 20121101212 in words is "twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred twelve".