20120212101211 has 4 divisors (see below), whose sum is σ = 20298267075672. Its totient is φ = 19942157126752.

The previous prime is 20120212101203. The next prime is 20120212101229. The reversal of 20120212101211 is 11210121202102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120212101211 - 2³ = 20120212101203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120212101281) 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 in 3 ways as a sum of consecutive naturals, for example, 89027487061 + ... + 89027487286.

It is an arithmetic number, because the mean of its divisors is an integer number (5074566768918).

Almost surely, 2^{20120212101211} is an apocalyptic number.

20120212101211 is a deficient number, since it is larger than the sum of its proper divisors (178054974461).

20120212101211 is a wasteful number, since it uses less digits than its factorization.

20120212101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178054974460.

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

Adding to 20120212101211 its reverse (11210121202102), we get a palindrome (31330333303313).

The spelling of 20120212101211 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, one hundred one thousand, two hundred eleven".