20120120121211 has 128 divisors (see below), whose sum is σ = 24670947133440. Its totient is φ = 16209414144000.

The previous prime is 20120120121193. The next prime is 20120120121259. The reversal of 20120120121211 is 11212102102102.

It is not a de Polignac number, because 20120120121211 - 2⁹ = 20120120120699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120120121281) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7759397131 + ... + 7759399723.

It is an arithmetic number, because the mean of its divisors is an integer number (192741774480).

Almost surely, 2^{20120120121211} is an apocalyptic number.

20120120121211 is a deficient number, since it is larger than the sum of its proper divisors (4550827012229).

20120120121211 is a wasteful number, since it uses less digits than its factorization.

20120120121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077.

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

Adding to 20120120121211 its reverse (11212102102102), we get a palindrome (31332222223313).

The spelling of 20120120121211 in words is "twenty trillion, one hundred twenty billion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".