1211002122 has 48 divisors (see below), whose sum is σ = 2674002240. Its totient is φ = 365344320.

The previous prime is 1211002043. The next prime is 1211002159. The reversal of 1211002122 is 2212001121.

It is a super-2 number, since 2×1211002122² = 2933052278977005768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211002098 and 1211002107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165579 + ... + 172737.

It is an arithmetic number, because the mean of its divisors is an integer number (55708380).

Almost surely, 2^1211002122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211002122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337001120).

1211002122 is an abundant number, since it is smaller than the sum of its proper divisors (1463000118).

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

1211002122 is a wasteful number, since it uses less digits than its factorization.

1211002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7419 (or 7408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211002122 is about 34799.4557716065. The cubic root of 1211002122 is about 1065.8963328489.

Adding to 1211002122 its reverse (2212001121), we get a palindrome (3423003243).

The spelling of 1211002122 in words is "one billion, two hundred eleven million, two thousand, one hundred twenty-two".