1012021103 has 4 divisors (see below), whose sum is σ = 1012844448. Its totient is φ = 1011197760.

The previous prime is 1012021093. The next prime is 1012021117. The reversal of 1012021103 is 3011202101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012021103 - 2⁸ = 1012020847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012021123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409826 + ... + 412287.

It is an arithmetic number, because the mean of its divisors is an integer number (253211112).

Almost surely, 2^1012021103 is an apocalyptic number.

1012021103 is a deficient number, since it is larger than the sum of its proper divisors (823345).

1012021103 is an equidigital number, since it uses as much as digits as its factorization.

1012021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823344.

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

The square root of 1012021103 is about 31812.2791230053. The cubic root of 1012021103 is about 1003.9910843877.

Adding to 1012021103 its reverse (3011202101), we get a palindrome (4023223204).

The spelling of 1012021103 in words is "one billion, twelve million, twenty-one thousand, one hundred three".