20011211010000 has 300 divisors, whose sum is σ = 79979540129632. Its totient is φ = 4573990944000.

The previous prime is 20011211009983. The next prime is 20011211010059. The reversal of 20011211010000 is 1011211002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (300).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 15251914 + ... + 16511913.

Almost surely, 2^{20011211010000} is an apocalyptic number.

20011211010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011211010000 is an abundant number, since it is smaller than the sum of its proper divisors (59968329119632).

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

20011211010000 is a wasteful number, since it uses less digits than its factorization.

20011211010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31763868 (or 31763844 counting only the distinct ones).

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

Adding to 20011211010000 its reverse (1011211002), we get a palindrome (20012222221002).

The spelling of 20011211010000 in words is "twenty trillion, eleven billion, two hundred eleven million, ten thousand".