20000011101021 has 24 divisors (see below), whose sum is σ = 33058602794880. Its totient is φ = 11413793038176.

The previous prime is 20000011101011. The next prime is 20000011101041. The reversal of 20000011101021 is 12010111000002.

It is a happy number.

It is not a de Polignac number, because 20000011101021 - 2⁶ = 20000011100957 is a prime.

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 = 20000011100994 and 20000011101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000011101001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205294441 + ... + 205391838.

It is an arithmetic number, because the mean of its divisors is an integer number (1377441783120).

Almost surely, 2^{20000011101021} is an apocalyptic number.

20000011101021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20000011101021 is a deficient number, since it is larger than the sum of its proper divisors (13058591693859).

20000011101021 is a wasteful number, since it uses less digits than its factorization.

20000011101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410687065 (or 410687062 counting only the distinct ones).

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

Adding to 20000011101021 its reverse (12010111000002), we get a palindrome (32010122101023).

The spelling of 20000011101021 in words is "twenty trillion, eleven million, one hundred one thousand, twenty-one".