1212220122210 has 48 divisors (see below), whose sum is σ = 3253442400000. Its totient is φ = 312830998560.

The previous prime is 1212220122203. The next prime is 1212220122313. The reversal of 1212220122210 is 122210222121.

It is a happy number.

1212220122210 is a `hidden beast` number, since 1 + 212 + 220 + 1 + 22 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217240960 + ... + 217246539.

It is an arithmetic number, because the mean of its divisors is an integer number (67780050000).

Almost surely, 2^{1212220122210} is an apocalyptic number.

1212220122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212220122210 is an abundant number, since it is smaller than the sum of its proper divisors (2041222277790).

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

1212220122210 is a wasteful number, since it uses less digits than its factorization.

1212220122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434487543 (or 434487540 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212220122210 its reverse (122210222121), we get a palindrome (1334430344331).

The spelling of 1212220122210 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, two hundred ten".