21201021101010 has 32 divisors (see below), whose sum is σ = 51386237289792. Its totient is φ = 5597629332800.

The previous prime is 21201021101009. The next prime is 21201021101069. The reversal of 21201021101010 is 1010112010212.

It is an unprimeable number.

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, 3498515304 + ... + 3498521363.

It is an arithmetic number, because the mean of its divisors is an integer number (1605819915306).

Almost surely, 2^{21201021101010} is an apocalyptic number.

21201021101010 is an abundant number, since it is smaller than the sum of its proper divisors (30185216188782).

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

21201021101010 is a wasteful number, since it uses less digits than its factorization.

21201021101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997036778.

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

Adding to 21201021101010 its reverse (1010112010212), we get a palindrome (22211133111222).

The spelling of 21201021101010 in words is "twenty-one trillion, two hundred one billion, twenty-one million, one hundred one thousand, ten".