1212122221030 has 128 divisors (see below), whose sum is σ = 2682515128320. Its totient is φ = 385058551680.

The previous prime is 1212122221021. The next prime is 1212122221069. The reversal of 1212122221030 is 301222212121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 1212122220989 and 1212122221007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98197039 + ... + 98209381.

It is an arithmetic number, because the mean of its divisors is an integer number (20957149440).

Almost surely, 2^{1212122221030} is an apocalyptic number.

1212122221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212122221030 is an abundant number, since it is smaller than the sum of its proper divisors (1470392907290).

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

1212122221030 is a wasteful number, since it uses less digits than its factorization.

1212122221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13994.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212122221030 its reverse (301222212121), we get a palindrome (1513344433151).

The spelling of 1212122221030 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, thirty".