1210021103 has 6 divisors (see below), whose sum is σ = 1218218904. Its totient is φ = 1201878104.

The previous prime is 1210021093. The next prime is 1210021133. The reversal of 1210021103 is 3011200121.

It is not a de Polignac number, because 1210021103 - 2²² = 1205826799 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 (1210021133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5051 + ... + 49452.

It is an arithmetic number, because the mean of its divisors is an integer number (203036484).

Almost surely, 2^1210021103 is an apocalyptic number.

1210021103 is a deficient number, since it is larger than the sum of its proper divisors (8197801).

1210021103 is an frugal number, since it uses more digits than its factorization.

1210021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54801 (or 54652 counting only the distinct ones).

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

The square root of 1210021103 is about 34785.3575948272. The cubic root of 1210021103 is about 1065.6084316077.

Adding to 1210021103 its reverse (3011200121), we get a palindrome (4221221224).

The spelling of 1210021103 in words is "one billion, two hundred ten million, twenty-one thousand, one hundred three".