212201101021 has 32 divisors (see below), whose sum is σ = 278324379648. Its totient is φ = 157178577600.

The previous prime is 212201101001. The next prime is 212201101031. The reversal of 212201101021 is 120101102212.

It is not a de Polignac number, because 212201101021 - 2⁵ = 212201100989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 212201100992 and 212201101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201101001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 980205 + ... + 1176946.

It is an arithmetic number, because the mean of its divisors is an integer number (8697636864).

Almost surely, 2^212201101021 is an apocalyptic number.

It is an amenable number.

212201101021 is a deficient number, since it is larger than the sum of its proper divisors (66123278627).

212201101021 is a wasteful number, since it uses less digits than its factorization.

212201101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157241.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212201101021 its reverse (120101102212), we get a palindrome (332302203233).

The spelling of 212201101021 in words is "two hundred twelve billion, two hundred one million, one hundred one thousand, twenty-one".