1211212122 has 16 divisors (see below), whose sum is σ = 2423790912. Its totient is φ = 403509600.

The previous prime is 1211212117. The next prime is 1211212151. The reversal of 1211212122 is 2212121121.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45238 + ... + 66849.

It is an arithmetic number, because the mean of its divisors is an integer number (151486932).

Almost surely, 2^1211212122 is an apocalyptic number.

1211212122 is an abundant number, since it is smaller than the sum of its proper divisors (1212578790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211212122 is a wasteful number, since it uses less digits than its factorization.

1211212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113893.

The product of its digits is 32, while the sum is 15.

The square root of 1211212122 is about 34802.4729293767. The cubic root of 1211212122 is about 1065.9579416847.

Adding to 1211212122 its reverse (2212121121), we get a palindrome (3423333243).

The spelling of 1211212122 in words is "one billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-two".