211221210001021 has 8 divisors (see below), whose sum is σ = 232704555393888. Its totient is φ = 190118100810000.

The previous prime is 211221210001003. The next prime is 211221210001033. The reversal of 211221210001021 is 120100012122112.

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

It is not a de Polignac number, because 211221210001021 - 2⁵ = 211221210000989 is a prime.

It is a super-2 number, since 2×211221210001021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211221210000986 and 211221210001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221210001091) 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, 95059049295 + ... + 95059051516.

It is an arithmetic number, because the mean of its divisors is an integer number (29088069424236).

Almost surely, 2^{211221210001021} is an apocalyptic number.

It is an amenable number.

211221210001021 is a deficient number, since it is larger than the sum of its proper divisors (21483345392867).

211221210001021 is a wasteful number, since it uses less digits than its factorization.

211221210001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190118100923.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211221210001021 its reverse (120100012122112), we get a palindrome (331321222123133).

The spelling of 211221210001021 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, one thousand, twenty-one".