1021000021087 has 2 divisors, whose sum is σ = 1021000021088. Its totient is φ = 1021000021086.

The previous prime is 1021000021007. The next prime is 1021000021103. The reversal of 1021000021087 is 7801200001201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021000021087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021000021007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500010543 + 510500010544.

It is an arithmetic number, because the mean of its divisors is an integer number (510500010544).

Almost surely, 2^{1021000021087} is an apocalyptic number.

1021000021087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021000021087 is an equidigital number, since it uses as much as digits as its factorization.

1021000021087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 1021000021087 its reverse (7801200001201), we get a palindrome (8822200022288).

The spelling of 1021000021087 in words is "one trillion, twenty-one billion, twenty-one thousand, eighty-seven".