1211200103 has 8 divisors (see below), whose sum is σ = 1225300272. Its totient is φ = 1197133056.

The previous prime is 1211200091. The next prime is 1211200117. The reversal of 1211200103 is 3010021121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211200103 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 (1211200153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69476 + ... + 85142.

It is an arithmetic number, because the mean of its divisors is an integer number (153162534).

Almost surely, 2^1211200103 is an apocalyptic number.

1211200103 is a deficient number, since it is larger than the sum of its proper divisors (14100169).

1211200103 is an equidigital number, since it uses as much as digits as its factorization.

1211200103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16561.

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

The square root of 1211200103 is about 34802.3002544372. The cubic root of 1211200103 is about 1065.9544157978.

Adding to 1211200103 its reverse (3010021121), we get a palindrome (4221221224).

The spelling of 1211200103 in words is "one billion, two hundred eleven million, two hundred thousand, one hundred three".