1212220122 has 32 divisors (see below), whose sum is σ = 2636442432. Its totient is φ = 370024704.

The previous prime is 1212220117. The next prime is 1212220123. The reversal of 1212220122 is 2210222121.

It is not an unprimeable number, because it can be changed into a prime (1212220123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156828 + ... + 164375.

It is an arithmetic number, because the mean of its divisors is an integer number (82388826).

Almost surely, 2^1212220122 is an apocalyptic number.

1212220122 is an abundant number, since it is smaller than the sum of its proper divisors (1424222310).

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

1212220122 is a wasteful number, since it uses less digits than its factorization.

1212220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321262.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1212220122 is about 34816.9516471503. The cubic root of 1212220122 is about 1066.2535650118.

Adding to 1212220122 its reverse (2210222121), we get a palindrome (3422442243).

The spelling of 1212220122 in words is "one billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-two".