20011201211212 has 6 divisors (see below), whose sum is σ = 35019602119628. Its totient is φ = 10005600605604.

The previous prime is 20011201211207. The next prime is 20011201211213. The reversal of 20011201211212 is 21211210211002.

It is a super-2 number, since 2×20011201211212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011201211213) 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 as a sum of consecutive naturals, namely, 2501400151398 + ... + 2501400151405.

Almost surely, 2^{20011201211212} is an apocalyptic number.

It is an amenable number.

20011201211212 is a deficient number, since it is larger than the sum of its proper divisors (15008400908416).

20011201211212 is a wasteful number, since it uses less digits than its factorization.

20011201211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002800302807 (or 5002800302805 counting only the distinct ones).

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

Adding to 20011201211212 its reverse (21211210211002), we get a palindrome (41222411422214).

The spelling of 20011201211212 in words is "twenty trillion, eleven billion, two hundred one million, two hundred eleven thousand, two hundred twelve".