20000021121011 has 8 divisors (see below), whose sum is σ = 20038800734304. Its totient is φ = 19961279069760.

The previous prime is 20000021120951. The next prime is 20000021121049. The reversal of 20000021121011 is 11012112000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000021121011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000021120983 and 20000021121001.

It is not an unprimeable number, because it can be changed into a prime (20000021121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8324456 + ... + 10454501.

It is an arithmetic number, because the mean of its divisors is an integer number (2504850091788).

Almost surely, 2^{20000021121011} is an apocalyptic number.

20000021121011 is a deficient number, since it is larger than the sum of its proper divisors (38779613293).

20000021121011 is a wasteful number, since it uses less digits than its factorization.

20000021121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18781021.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20000021121011 its reverse (11012112000002), we get a palindrome (31012133121013).

The spelling of 20000021121011 in words is "twenty trillion, twenty-one million, one hundred twenty-one thousand, eleven".