1211122219 has 12 divisors (see below), whose sum is σ = 1255451736. Its totient is φ = 1167723648.

The previous prime is 1211122207. The next prime is 1211122261. The reversal of 1211122219 is 9122211121.

It is not a de Polignac number, because 1211122219 - 2²¹ = 1209025067 is a prime.

It is a super-2 number, since 2×1211122219² = 2933634058710967922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211122219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211122019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266107 + ... + 270619.

It is an arithmetic number, because the mean of its divisors is an integer number (104620978).

Almost surely, 2^1211122219 is an apocalyptic number.

1211122219 is a deficient number, since it is larger than the sum of its proper divisors (44329517).

1211122219 is an frugal number, since it uses more digits than its factorization.

1211122219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4714 (or 4635 counting only the distinct ones).

The product of its digits is 144, while the sum is 22.

The square root of 1211122219 is about 34801.1812874218. The cubic root of 1211122219 is about 1065.9315672272.

The spelling of 1211122219 in words is "one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred nineteen".