21120020001011 has 8 divisors (see below), whose sum is σ = 21848357330400. Its totient is φ = 20391686723520.

The previous prime is 21120020000939. The next prime is 21120020001029. The reversal of 21120020001011 is 11010002002112.

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

It is a cyclic number.

It is not a de Polignac number, because 21120020001011 - 2¹⁴ = 21120019984627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120020000983 and 21120020001001.

It is not an unprimeable number, because it can be changed into a prime (21120020001061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12770591 + ... + 14329271.

It is an arithmetic number, because the mean of its divisors is an integer number (2731044666300).

Almost surely, 2^{21120020001011} is an apocalyptic number.

21120020001011 is a deficient number, since it is larger than the sum of its proper divisors (728337329389).

21120020001011 is a wasteful number, since it uses less digits than its factorization.

21120020001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025949.

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

Adding to 21120020001011 its reverse (11010002002112), we get a palindrome (32130022003123).

The spelling of 21120020001011 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one thousand, eleven".