20001212120211 has 16 divisors (see below), whose sum is σ = 30932933601024. Its totient is φ = 11258678037024.

The previous prime is 20001212120207. The next prime is 20001212120311. The reversal of 20001212120211 is 11202121210002.

It is not a de Polignac number, because 20001212120211 - 2² = 20001212120207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001212120311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7107749880 + ... + 7107752693.

It is an arithmetic number, because the mean of its divisors is an integer number (1933308350064).

Almost surely, 2^{20001212120211} is an apocalyptic number.

20001212120211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20001212120211 is a deficient number, since it is larger than the sum of its proper divisors (10931721480813).

20001212120211 is a wasteful number, since it uses less digits than its factorization.

20001212120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14215502650.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20001212120211 its reverse (11202121210002), we get a palindrome (31203333330213).

The spelling of 20001212120211 in words is "twenty trillion, one billion, two hundred twelve million, one hundred twenty thousand, two hundred eleven".