20001211122212 has 24 divisors (see below), whose sum is σ = 35472631434240. Its totient is φ = 9867043680480.

The previous prime is 20001211122209. The next prime is 20001211122287. The reversal of 20001211122212 is 21222111210002.

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, 108671762 + ... + 108855657.

It is an arithmetic number, because the mean of its divisors is an integer number (1478026309760).

Almost surely, 2^{20001211122212} is an apocalyptic number.

It is an amenable number.

20001211122212 is a deficient number, since it is larger than the sum of its proper divisors (15471420312028).

20001211122212 is a wasteful number, since it uses less digits than its factorization.

20001211122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217527731 (or 217527729 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20001211122212 its reverse (21222111210002), we get a palindrome (41223322332214).

The spelling of 20001211122212 in words is "twenty trillion, one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twelve".