2102021233021 has 2 divisors, whose sum is σ = 2102021233022. Its totient is φ = 2102021233020.

The previous prime is 2102021232953. The next prime is 2102021233057. The reversal of 2102021233021 is 1203321202012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988836088121 + 113185144900 = 1410261^2 + 336430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102021233021 - 2¹⁷ = 2102021101949 is a prime.

It is a super-2 number, since 2×2102021233021² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102021233021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102021233721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051010616510 + 1051010616511.

It is an arithmetic number, because the mean of its divisors is an integer number (1051010616511).

Almost surely, 2^{2102021233021} is an apocalyptic number.

It is an amenable number.

2102021233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102021233021 is an equidigital number, since it uses as much as digits as its factorization.

2102021233021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2102021233021 its reverse (1203321202012), we get a palindrome (3305342435033).

The spelling of 2102021233021 in words is "two trillion, one hundred two billion, twenty-one million, two hundred thirty-three thousand, twenty-one".