1221222122210 has 32 divisors (see below), whose sum is σ = 2249423618112. Its totient is φ = 477106822080.

The previous prime is 1221222122209. The next prime is 1221222122233. The reversal of 1221222122210 is 122212221221.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11914580 + ... + 12016640.

It is an arithmetic number, because the mean of its divisors is an integer number (70294488066).

Almost surely, 2^{1221222122210} is an apocalyptic number.

1221222122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221222122210 is a deficient number, since it is larger than the sum of its proper divisors (1028201495902).

1221222122210 is a wasteful number, since it uses less digits than its factorization.

1221222122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129938.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221222122210 its reverse (122212221221), we get a palindrome (1343434343431).

The spelling of 1221222122210 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred ten".