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2102002020221 is a prime number
BaseRepresentation
bin11110100101101001000…
…101010110111101111101
321102221122010122100122212
4132211221011112331331
5233414400004121341
64245351342150205
7304602366241145
oct36455105267575
97387563570585
102102002020221
117404aa383354
1229b470282365
131232aaa7785c
1473a47773925
1539a27d785eb
hex1e969156f7d

2102002020221 has 2 divisors, whose sum is σ = 2102002020222. Its totient is φ = 2102002020220.

The previous prime is 2102002020197. The next prime is 2102002020253. The reversal of 2102002020221 is 1220202002012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2049876564121 + 52125456100 = 1431739^2 + 228310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102002020221 - 226 = 2101934911357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102002020196 and 2102002020205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102002020721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051001010110 + 1051001010111.

It is an arithmetic number, because the mean of its divisors is an integer number (1051001010111).

Almost surely, 22102002020221 is an apocalyptic number.

It is an amenable number.

2102002020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102002020221 is an equidigital number, since it uses as much as digits as its factorization.

2102002020221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2102002020221 its reverse (1220202002012), we get a palindrome (3322204022233).

The spelling of 2102002020221 in words is "two trillion, one hundred two billion, two million, twenty thousand, two hundred twenty-one".