21210001011010 has 48 divisors (see below), whose sum is σ = 44850859385400. Its totient is φ = 7200000326400.

The previous prime is 21210001010963. The next prime is 21210001011113. The reversal of 21210001011010 is 1011010001212.

It can be written as a sum of positive squares in 4 ways, for example, as 15170503074489 + 6039497936521 = 3894933^2 + 2457539^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214236235 + ... + 214335214.

Almost surely, 2^{21210001011010} is an apocalyptic number.

21210001011010 is an abundant number, since it is smaller than the sum of its proper divisors (23640858374390).

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

21210001011010 is a wasteful number, since it uses less digits than its factorization.

21210001011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428571571 (or 428571564 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21210001011010 its reverse (1011010001212), we get a palindrome (22221011012222).

The spelling of 21210001011010 in words is "twenty-one trillion, two hundred ten billion, one million, eleven thousand, ten".