20101202221211 has 4 divisors (see below), whose sum is σ = 20101219148400. Its totient is φ = 20101185294024.

The previous prime is 20101202221147. The next prime is 20101202221279. The reversal of 20101202221211 is 11212220210102.

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 20101202221211 - 2⁶ = 20101202221147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20101202221211.

It is not an unprimeable number, because it can be changed into a prime (20101202221811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535991 + ... + 9106128.

It is an arithmetic number, because the mean of its divisors is an integer number (5025304787100).

Almost surely, 2^{20101202221211} is an apocalyptic number.

20101202221211 is a deficient number, since it is larger than the sum of its proper divisors (16927189).

20101202221211 is a wasteful number, since it uses less digits than its factorization.

20101202221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16927188.

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

Adding to 20101202221211 its reverse (11212220210102), we get a palindrome (31313422431313).

The spelling of 20101202221211 in words is "twenty trillion, one hundred one billion, two hundred two million, two hundred twenty-one thousand, two hundred eleven".