102000020002021 has 2 divisors, whose sum is σ = 102000020002022. Its totient is φ = 102000020002020.

The previous prime is 102000020002009. The next prime is 102000020002121. The reversal of 102000020002021 is 120200020000201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79857207473796 + 22142812528225 = 8936286^2 + 4705615^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000020002021 - 2⁴¹ = 99800996746469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102000020001989 and 102000020002007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102000020002121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000010001010 + 51000010001011.

It is an arithmetic number, because the mean of its divisors is an integer number (51000010001011).

Almost surely, 2^{102000020002021} is an apocalyptic number.

It is an amenable number.

102000020002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102000020002021 is an equidigital number, since it uses as much as digits as its factorization.

102000020002021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 102000020002021 its reverse (120200020000201), we get a palindrome (222200040002222).

The spelling of 102000020002021 in words is "one hundred two trillion, twenty million, two thousand, twenty-one".