21120011200001 has 32 divisors (see below), whose sum is σ = 25214997012480. Its totient is φ = 17309376000000.

The previous prime is 21120011199977. The next prime is 21120011200073. The reversal of 21120011200001 is 10000211002112.

It is not a de Polignac number, because 21120011200001 - 2¹⁴ = 21120011183617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21120011200201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7600001 + ... + 10000001.

It is an arithmetic number, because the mean of its divisors is an integer number (787968656640).

Almost surely, 2^{21120011200001} is an apocalyptic number.

It is an amenable number.

21120011200001 is a deficient number, since it is larger than the sum of its proper divisors (4094985812479).

21120011200001 is a wasteful number, since it uses less digits than its factorization.

21120011200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400525.

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

Adding to 21120011200001 its reverse (10000211002112), we get a palindrome (31120222202113).

The spelling of 21120011200001 in words is "twenty-one trillion, one hundred twenty billion, eleven million, two hundred thousand, one".