201220202021 has 8 divisors (see below), whose sum is σ = 202491987360. Its totient is φ = 199948871952.

The previous prime is 201220202009. The next prime is 201220202093. The reversal of 201220202021 is 120202022102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220201987 and 201220202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222202021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795815 + ... + 1017723.

It is an arithmetic number, because the mean of its divisors is an integer number (25311498420).

Almost surely, 2^201220202021 is an apocalyptic number.

It is an amenable number.

201220202021 is a deficient number, since it is larger than the sum of its proper divisors (1271785339).

201220202021 is a wasteful number, since it uses less digits than its factorization.

201220202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227635.

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

Adding to 201220202021 its reverse (120202022102), we get a palindrome (321422224123).

The spelling of 201220202021 in words is "two hundred one billion, two hundred twenty million, two hundred two thousand, twenty-one".