20111000012010 has 192 divisors, whose sum is σ = 54779221306368. Its totient is φ = 5109355418112.

The previous prime is 20111000011967. The next prime is 20111000012023. The reversal of 20111000012010 is 1021000011102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20111000011983 and 20111000012001.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2209267119 + ... + 2209276221.

It is an arithmetic number, because the mean of its divisors is an integer number (285308444304).

Almost surely, 2^{20111000012010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111000012010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27389610653184).

20111000012010 is an abundant number, since it is smaller than the sum of its proper divisors (34668221294358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111000012010 is a wasteful number, since it uses less digits than its factorization.

20111000012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13269 (or 13266 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20111000012010 its reverse (1021000011102), we get a palindrome (21132000023112).

The spelling of 20111000012010 in words is "twenty trillion, one hundred eleven billion, twelve thousand, ten".