20101202222111 has 4 divisors (see below), whose sum is σ = 20172231205512. Its totient is φ = 20030173238712.

The previous prime is 20101202222099. The next prime is 20101202222197. The reversal of 20101202222111 is 11122220210102.

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 20101202222111 - 2³⁸ = 19826324315167 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 20101202222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101202222411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35514491276 + ... + 35514491841.

It is an arithmetic number, because the mean of its divisors is an integer number (5043057801378).

Almost surely, 2^{20101202222111} is an apocalyptic number.

20101202222111 is a deficient number, since it is larger than the sum of its proper divisors (71028983401).

20101202222111 is an equidigital number, since it uses as much as digits as its factorization.

20101202222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71028983400.

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

Adding to 20101202222111 its reverse (11122220210102), we get a palindrome (31223422432213).

The spelling of 20101202222111 in words is "twenty trillion, one hundred one billion, two hundred two million, two hundred twenty-two thousand, one hundred eleven".