20012211102101 has 4 divisors (see below), whose sum is σ = 20013509515692. Its totient is φ = 20010912688512.

The previous prime is 20012211102053. The next prime is 20012211102139. The reversal of 20012211102101 is 10120111221002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17856455976100 + 2155755126001 = 4225690^2 + 1468249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012211102101 is a prime.

It is a super-2 number, since 2×20012211102101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012211102701) 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, 649183676 + ... + 649214501.

It is an arithmetic number, because the mean of its divisors is an integer number (5003377378923).

Almost surely, 2^{20012211102101} is an apocalyptic number.

It is an amenable number.

20012211102101 is a deficient number, since it is larger than the sum of its proper divisors (1298413591).

20012211102101 is a wasteful number, since it uses less digits than its factorization.

20012211102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298413590.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20012211102101 its reverse (10120111221002), we get a palindrome (30132322323103).

The spelling of 20012211102101 in words is "twenty trillion, twelve billion, two hundred eleven million, one hundred two thousand, one hundred one".