21112021010002 has 16 divisors (see below), whose sum is σ = 34663116465432. Its totient is φ = 9584271832320.

The previous prime is 21112021009997. The next prime is 21112021010033. The reversal of 21112021010002 is 20001012021112.

It can be written as a sum of positive squares in 4 ways, for example, as 4459492286001 + 16652528724001 = 2111751^2 + 4080751^2 .

It is a super-2 number, since 2×21112021010002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6655742743 + ... + 6655745914.

Almost surely, 2^{21112021010002} is an apocalyptic number.

21112021010002 is a deficient number, since it is larger than the sum of its proper divisors (13551095455430).

21112021010002 is a wasteful number, since it uses less digits than its factorization.

21112021010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13311488733.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112021010002 its reverse (20001012021112), we get a palindrome (41113033031114).

The spelling of 21112021010002 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, ten thousand, two".