1002120202021 has 2 divisors, whose sum is σ = 1002120202022. Its totient is φ = 1002120202020.

The previous prime is 1002120201997. The next prime is 1002120202033. The reversal of 1002120202021 is 1202020212001.

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., 843844332100 + 158275869921 = 918610^2 + 397839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002120202021 - 2²³ = 1002111813413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002120201992 and 1002120202010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002120200021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501060101010 + 501060101011.

It is an arithmetic number, because the mean of its divisors is an integer number (501060101011).

Almost surely, 2^{1002120202021} is an apocalyptic number.

It is an amenable number.

1002120202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002120202021 is an equidigital number, since it uses as much as digits as its factorization.

1002120202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1002120202021 its reverse (1202020212001), we get a palindrome (2204140414022).

The spelling of 1002120202021 in words is "one trillion, two billion, one hundred twenty million, two hundred two thousand, twenty-one".