1021100100103 has 2 divisors, whose sum is σ = 1021100100104. Its totient is φ = 1021100100102.

The previous prime is 1021100100071. The next prime is 1021100100173. The reversal of 1021100100103 is 3010010011201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021100100103 - 2⁵ = 1021100100071 is a prime.

It is a super-2 number, since 2×1021100100103² (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 1021100100103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021100100173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510550050051 + 510550050052.

It is an arithmetic number, because the mean of its divisors is an integer number (510550050052).

Almost surely, 2^{1021100100103} is an apocalyptic number.

1021100100103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021100100103 is an equidigital number, since it uses as much as digits as its factorization.

1021100100103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 1021100100103 its reverse (3010010011201), we get a palindrome (4031110111304).

The spelling of 1021100100103 in words is "one trillion, twenty-one billion, one hundred million, one hundred thousand, one hundred three".