1212200122 has 24 divisors (see below), whose sum is σ = 2116869876. Its totient is φ = 519095808.

The previous prime is 1212200107. The next prime is 1212200123. The reversal of 1212200122 is 2210022121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 790678161 + 421521961 = 28119^2 + 20531^2 .

It is not an unprimeable number, because it can be changed into a prime (1212200123) 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, 138138 + ... + 146650.

Almost surely, 2^1212200122 is an apocalyptic number.

1212200122 is a deficient number, since it is larger than the sum of its proper divisors (904669754).

1212200122 is a wasteful number, since it uses less digits than its factorization.

1212200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9982 (or 9975 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1212200122 is about 34816.6644295515. The cubic root of 1212200122 is about 1066.2477010634.

Adding to 1212200122 its reverse (2210022121), we get a palindrome (3422222243).

The spelling of 1212200122 in words is "one billion, two hundred twelve million, two hundred thousand, one hundred twenty-two".