21121010300011 has 4 divisors (see below), whose sum is σ = 21121385114800. Its totient is φ = 21120635485224.

The previous prime is 21121010300009. The next prime is 21121010300053. The reversal of 21121010300011 is 11000301012112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21121010300011 - 2¹ = 21121010300009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121010299964 and 21121010300000.

It is not an unprimeable number, because it can be changed into a prime (21121010303011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187322856 + ... + 187435573.

It is an arithmetic number, because the mean of its divisors is an integer number (5280346278700).

Almost surely, 2^{21121010300011} is an apocalyptic number.

21121010300011 is a deficient number, since it is larger than the sum of its proper divisors (374814789).

21121010300011 is an equidigital number, since it uses as much as digits as its factorization.

21121010300011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374814788.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21121010300011 its reverse (11000301012112), we get a palindrome (32121311312123).

The spelling of 21121010300011 in words is "twenty-one trillion, one hundred twenty-one billion, ten million, three hundred thousand, eleven".