20210021212201 has 16 divisors (see below), whose sum is σ = 21092455014400. Its totient is φ = 19349929701648.

The previous prime is 20210021212151. The next prime is 20210021212217. The reversal of 20210021212201 is 10221212001202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20210021212201 - 2¹¹ = 20210021210153 is a prime.

It is a super-2 number, since 2×20210021212201² (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 (20210021215201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20928441 + ... + 21872806.

It is an arithmetic number, because the mean of its divisors is an integer number (1318278438400).

Almost surely, 2^{20210021212201} is an apocalyptic number.

It is an amenable number.

20210021212201 is a deficient number, since it is larger than the sum of its proper divisors (882433802199).

20210021212201 is a wasteful number, since it uses less digits than its factorization.

20210021212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42801508.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20210021212201 its reverse (10221212001202), we get a palindrome (30431233213403).

The spelling of 20210021212201 in words is "twenty trillion, two hundred ten billion, twenty-one million, two hundred twelve thousand, two hundred one".