21000000010010 has 32 divisors (see below), whose sum is σ = 43200158965632. Its totient is φ = 7199973512640.

The previous prime is 21000000010009. The next prime is 21000000010027. The reversal of 21000000010010 is 1001000000012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 21000000009976 and 21000000010003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33582869 + ... + 34202471.

It is an arithmetic number, because the mean of its divisors is an integer number (1350004967676).

Almost surely, 2^{21000000010010} is an apocalyptic number.

21000000010010 is an abundant number, since it is smaller than the sum of its proper divisors (22200158955622).

21000000010010 is a wasteful number, since it uses less digits than its factorization.

21000000010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103798.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 21000000010010 its reverse (1001000000012), we get a palindrome (22001000010022).

The spelling of 21000000010010 in words is "twenty-one trillion, ten thousand, ten".