20101101221211 has 16 divisors (see below), whose sum is σ = 26889003235200. Its totient is φ = 13356986448960.

The previous prime is 20101101221161. The next prime is 20101101221251. The reversal of 20101101221211 is 11212210110102.

It is a happy number.

It is not a de Polignac number, because 20101101221211 - 2²³ = 20101092832603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101101221251) 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, 1601071 + ... + 6539543.

It is an arithmetic number, because the mean of its divisors is an integer number (1680562702200).

Almost surely, 2^{20101101221211} is an apocalyptic number.

20101101221211 is a deficient number, since it is larger than the sum of its proper divisors (6787902013989).

20101101221211 is a wasteful number, since it uses less digits than its factorization.

20101101221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942906.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20101101221211 its reverse (11212210110102), we get a palindrome (31313311331313).

The spelling of 20101101221211 in words is "twenty trillion, one hundred one billion, one hundred one million, two hundred twenty-one thousand, two hundred eleven".