202022002101221 has 2 divisors, whose sum is σ = 202022002101222. Its totient is φ = 202022002101220.

The previous prime is 202022002101209. The next prime is 202022002101239. The reversal of 202022002101221 is 122101200220202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166558666989121 + 35463335112100 = 12905761^2 + 5955110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202022002101221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202022002101221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202022002103221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101011001050610 + 101011001050611.

It is an arithmetic number, because the mean of its divisors is an integer number (101011001050611).

Almost surely, 2^{202022002101221} is an apocalyptic number.

It is an amenable number.

202022002101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202022002101221 is an equidigital number, since it uses as much as digits as its factorization.

202022002101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202022002101221 its reverse (122101200220202), we get a palindrome (324123202321423).

The spelling of 202022002101221 in words is "two hundred two trillion, twenty-two billion, two million, one hundred one thousand, two hundred twenty-one".