20111212020101 has 4 divisors (see below), whose sum is σ = 20151194549472. Its totient is φ = 20071229490732.

The previous prime is 20111212020079. The next prime is 20111212020139. The reversal of 20111212020101 is 10102021211102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111212020101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111212020901) 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, 19991263931 + ... + 19991264936.

It is an arithmetic number, because the mean of its divisors is an integer number (5037798637368).

Almost surely, 2^{20111212020101} is an apocalyptic number.

It is an amenable number.

20111212020101 is a deficient number, since it is larger than the sum of its proper divisors (39982529371).

20111212020101 is an equidigital number, since it uses as much as digits as its factorization.

20111212020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39982529370.

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

Adding to 20111212020101 its reverse (10102021211102), we get a palindrome (30213233231203).

It can be divided in two parts, 20111 and 212020101, that added together give a palindrome (212040212).

The spelling of 20111212020101 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, twenty thousand, one hundred one".