21011110010004 has 48 divisors (see below), whose sum is σ = 49761689725440. Its totient is φ = 6899336680320.

The previous prime is 21011110010003. The next prime is 21011110010227. The reversal of 21011110010004 is 40001001111012.

It is a super-4 number, since 4×21011110010004⁴ (a number of 54 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011110010003) 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 15 ways as a sum of consecutive naturals, for example, 46200132 + ... + 46652699.

It is an arithmetic number, because the mean of its divisors is an integer number (1036701869280).

Almost surely, 2^{21011110010004} is an apocalyptic number.

It is an amenable number.

21011110010004 is an abundant number, since it is smaller than the sum of its proper divisors (28750579715436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011110010004 is a wasteful number, since it uses less digits than its factorization.

21011110010004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92853120 (or 92853118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011110010004 its reverse (40001001111012), we get a palindrome (61012111121016).

The spelling of 21011110010004 in words is "twenty-one trillion, eleven billion, one hundred ten million, ten thousand, four".