21010012012124 has 12 divisors (see below), whose sum is σ = 36768461712864. Its totient is φ = 10504737237024.

The previous prime is 21010012012117. The next prime is 21010012012133. The reversal of 21010012012124 is 42121021001012.

21010012012124 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21010012012124² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67016324 + ... + 67329099.

It is an arithmetic number, because the mean of its divisors is an integer number (3064038476072).

Almost surely, 2^{21010012012124} is an apocalyptic number.

It is an amenable number.

21010012012124 is a deficient number, since it is larger than the sum of its proper divisors (15758449700740).

21010012012124 is a wasteful number, since it uses less digits than its factorization.

21010012012124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134384524 (or 134384522 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21010012012124 its reverse (42121021001012), we get a palindrome (63131033013136).

The spelling of 21010012012124 in words is "twenty-one trillion, ten billion, twelve million, twelve thousand, one hundred twenty-four".