1211222130 has 32 divisors (see below), whose sum is σ = 2916126144. Its totient is φ = 321971136.

The previous prime is 1211222099. The next prime is 1211222153. The reversal of 1211222130 is 312221121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54172 + ... + 73191.

It is an arithmetic number, because the mean of its divisors is an integer number (91128942).

Almost surely, 2^1211222130 is an apocalyptic number.

1211222130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211222130 is an abundant number, since it is smaller than the sum of its proper divisors (1704904014).

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

1211222130 is a wasteful number, since it uses less digits than its factorization.

1211222130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127690.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1211222130 is about 34802.6167119658. The cubic root of 1211222130 is about 1065.9608776080.

Adding to 1211222130 its reverse (312221121), we get a palindrome (1523443251).

The spelling of 1211222130 in words is "one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred thirty".