1021021103 has 2 divisors, whose sum is σ = 1021021104. Its totient is φ = 1021021102.

The previous prime is 1021021093. The next prime is 1021021121. The reversal of 1021021103 is 3011201201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021021103 - 2¹⁶ = 1020955567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021021123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510551 + 510510552.

It is an arithmetic number, because the mean of its divisors is an integer number (510510552).

Almost surely, 2^1021021103 is an apocalyptic number.

1021021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021021103 is an equidigital number, since it uses as much as digits as its factorization.

1021021103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1021021103 is about 31953.4208340829. The cubic root of 1021021103 is about 1006.9585012813.

Adding to 1021021103 its reverse (3011201201), we get a palindrome (4032222304).

It can be divided in two parts, 10210 and 21103, that added together give a palindrome (31313).

The spelling of 1021021103 in words is "one billion, twenty-one million, twenty-one thousand, one hundred three".