21000010012110 has 96 divisors (see below), whose sum is σ = 58811809425408. Its totient is φ = 5183733170880.

The previous prime is 21000010012073. The next prime is 21000010012127. The reversal of 21000010012110 is 1121001000012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21000010012092 and 21000010012101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163563772 + ... + 163692111.

It is an arithmetic number, because the mean of its divisors is an integer number (612623014848).

Almost surely, 2^{21000010012110} is an apocalyptic number.

21000010012110 is an abundant number, since it is smaller than the sum of its proper divisors (37811799413298).

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

21000010012110 is a wasteful number, since it uses less digits than its factorization.

21000010012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327255950 (or 327255947 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21000010012110 its reverse (1121001000012), we get a palindrome (22121011012122).

The spelling of 21000010012110 in words is "twenty-one trillion, ten million, twelve thousand, one hundred ten".