1020002201021 has 2 divisors, whose sum is σ = 1020002201022. Its totient is φ = 1020002201020.

The previous prime is 1020002201003. The next prime is 1020002201027. The reversal of 1020002201021 is 1201022000201.

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., 695199093796 + 324803107225 = 833786^2 + 569915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020002201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020002200993 and 1020002201011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020002201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510001100510 + 510001100511.

It is an arithmetic number, because the mean of its divisors is an integer number (510001100511).

Almost surely, 2^{1020002201021} is an apocalyptic number.

It is an amenable number.

1020002201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020002201021 is an equidigital number, since it uses as much as digits as its factorization.

1020002201021 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 11.

Adding to 1020002201021 its reverse (1201022000201), we get a palindrome (2221024201222).

The spelling of 1020002201021 in words is "one trillion, twenty billion, two million, two hundred one thousand, twenty-one".