1211422503 has 16 divisors (see below), whose sum is σ = 1621905120. Its totient is φ = 804286464.

The previous prime is 1211422493. The next prime is 1211422507. The reversal of 1211422503 is 3052241121.

It is not a de Polignac number, because 1211422503 - 2¹⁶ = 1211356967 is a prime.

It is a super-3 number, since 3×1211422503³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211422503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211422507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303543 + ... + 1304471.

It is an arithmetic number, because the mean of its divisors is an integer number (101369070).

Almost surely, 2^1211422503 is an apocalyptic number.

1211422503 is a deficient number, since it is larger than the sum of its proper divisors (410482617).

1211422503 is an equidigital number, since it uses as much as digits as its factorization.

1211422503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1211422503 is about 34805.4952988749. The cubic root of 1211422503 is about 1066.0196551563.

Adding to 1211422503 its reverse (3052241121), we get a palindrome (4263663624).

The spelling of 1211422503 in words is "one billion, two hundred eleven million, four hundred twenty-two thousand, five hundred three".