201222020021 has 24 divisors (see below), whose sum is σ = 237010136832. Its totient is φ = 170094108800.

The previous prime is 201222019991. The next prime is 201222020039. The reversal of 201222020021 is 120020222102.

It is not a de Polignac number, because 201222020021 - 2¹⁰ = 201222018997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201222019978 and 201222020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222020071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418565 + ... + 760026.

It is an arithmetic number, because the mean of its divisors is an integer number (9875422368).

Almost surely, 2^201222020021 is an apocalyptic number.

It is an amenable number.

201222020021 is a deficient number, since it is larger than the sum of its proper divisors (35788116811).

201222020021 is a wasteful number, since it uses less digits than its factorization.

201222020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178713 (or 1178702 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 201222020021 its reverse (120020222102), we get a palindrome (321242242123).

It can be divided in two parts, 201 and 222020021, that added together give a palindrome (222020222).

The spelling of 201222020021 in words is "two hundred one billion, two hundred twenty-two million, twenty thousand, twenty-one".