20101220000011 has 64 divisors (see below), whose sum is σ = 24000895226880. Its totient is φ = 16691894968320.

The previous prime is 20101219999999. The next prime is 20101220000023. The reversal of 20101220000011 is 11000002210102.

It is an interprime number because it is at equal distance from previous prime (20101219999999) and next prime (20101220000023).

It is not a de Polignac number, because 20101220000011 - 2²⁵ = 20101186445579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101220000611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51384691 + ... + 51774403.

It is an arithmetic number, because the mean of its divisors is an integer number (375013987920).

Almost surely, 2^{20101220000011} is an apocalyptic number.

20101220000011 is a deficient number, since it is larger than the sum of its proper divisors (3899675226869).

20101220000011 is a wasteful number, since it uses less digits than its factorization.

20101220000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389956.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101220000011 its reverse (11000002210102), we get a palindrome (31101222210113).

The spelling of 20101220000011 in words is "twenty trillion, one hundred one billion, two hundred twenty million, eleven", and thus it is an aban number.