21021030213011 has 8 divisors (see below), whose sum is σ = 21609027444480. Its totient is φ = 20434078312128.

The previous prime is 21021030212957. The next prime is 21021030213031. The reversal of 21021030213011 is 11031203012012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021030213011 is a prime.

It is a super-2 number, since 2×21021030213011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021030213031) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 261291866 + ... + 261372303.

It is an arithmetic number, because the mean of its divisors is an integer number (2701128430560).

Almost surely, 2^{21021030213011} is an apocalyptic number.

21021030213011 is a deficient number, since it is larger than the sum of its proper divisors (587997231469).

21021030213011 is a wasteful number, since it uses less digits than its factorization.

21021030213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522665293.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21021030213011 its reverse (11031203012012), we get a palindrome (32052233225023).

The spelling of 21021030213011 in words is "twenty-one trillion, twenty-one billion, thirty million, two hundred thirteen thousand, eleven".