212021323401 has 16 divisors (see below), whose sum is σ = 299336710464. Its totient is φ = 133027436544.

The previous prime is 212021323351. The next prime is 212021323463. The reversal of 212021323401 is 104323120212.

212021323401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212021323401 - 2¹⁵ = 212021290633 is a prime.

It is a super-2 number, since 2×212021323401² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212021323601) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1392505 + ... + 1537241.

It is an arithmetic number, because the mean of its divisors is an integer number (18708544404).

Almost surely, 2^212021323401 is an apocalyptic number.

It is an amenable number.

212021323401 is a deficient number, since it is larger than the sum of its proper divisors (87315387063).

212021323401 is a wasteful number, since it uses less digits than its factorization.

212021323401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173480.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212021323401 its reverse (104323120212), we get a palindrome (316344443613).

The spelling of 212021323401 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-three thousand, four hundred one".