1021002112087 has 2 divisors, whose sum is σ = 1021002112088. Its totient is φ = 1021002112086.

The previous prime is 1021002112079. The next prime is 1021002112139. The reversal of 1021002112087 is 7802112001201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021002112087 - 2³ = 1021002112079 is a prime.

It is a super-2 number, since 2×1021002112087² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021002112007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510501056043 + 510501056044.

It is an arithmetic number, because the mean of its divisors is an integer number (510501056044).

Almost surely, 2^{1021002112087} is an apocalyptic number.

1021002112087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021002112087 is an equidigital number, since it uses as much as digits as its factorization.

1021002112087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 1021002112087 its reverse (7802112001201), we get a palindrome (8823114113288).

The spelling of 1021002112087 in words is "one trillion, twenty-one billion, two million, one hundred twelve thousand, eighty-seven".