2210102021521 has 2 divisors, whose sum is σ = 2210102021522. Its totient is φ = 2210102021520.

The previous prime is 2210102021503. The next prime is 2210102021537. The reversal of 2210102021521 is 1251202010122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1358844833025 + 851257188496 = 1165695^2 + 922636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210102021521 - 2⁵ = 2210102021489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2210102021821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105051010760 + 1105051010761.

It is an arithmetic number, because the mean of its divisors is an integer number (1105051010761).

Almost surely, 2^{2210102021521} is an apocalyptic number.

It is an amenable number.

2210102021521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210102021521 is an equidigital number, since it uses as much as digits as its factorization.

2210102021521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 2210102021521 its reverse (1251202010122), we get a palindrome (3461304031643).

The spelling of 2210102021521 in words is "two trillion, two hundred ten billion, one hundred two million, twenty-one thousand, five hundred twenty-one".