211221210001024 has 16 divisors (see below), whose sum is σ = 420792254299170. Its totient is φ = 105610605000448.

The previous prime is 211221210001003. The next prime is 211221210001033. The reversal of 211221210001024 is 420100012122112.

It can be written as a sum of positive squares in only one way, i.e., 211218785423424 + 2424577600 = 14533368^2 + 49240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×211221210001024² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221210000992 and 211221210001010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825082851439 + ... + 825082851694.

Almost surely, 2^{211221210001024} is an apocalyptic number.

It is an amenable number.

211221210001024 is a deficient number, since it is larger than the sum of its proper divisors (209571044298146).

211221210001024 is an equidigital number, since it uses as much as digits as its factorization.

211221210001024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650165703147 (or 1650165703135 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211221210001024 its reverse (420100012122112), we get a palindrome (631321222123136).

The spelling of 211221210001024 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, one thousand, twenty-four".