21012101001010 has 64 divisors (see below), whose sum is σ = 44805937397760. Its totient is φ = 6942586311360.

The previous prime is 21012101000981. The next prime is 21012101001037. The reversal of 21012101001010 is 1010010121012.

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 31 ways as a sum of consecutive naturals, for example, 19738684 + ... + 20775943.

It is an arithmetic number, because the mean of its divisors is an integer number (700092771840).

Almost surely, 2^{21012101001010} is an apocalyptic number.

21012101001010 is an abundant number, since it is smaller than the sum of its proper divisors (23793836396750).

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

21012101001010 is a wasteful number, since it uses less digits than its factorization.

21012101001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40514911.

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

Adding to 21012101001010 its reverse (1010010121012), we get a palindrome (22022111122022).

The spelling of 21012101001010 in words is "twenty-one trillion, twelve billion, one hundred one million, one thousand, ten".