1212222021010 has 96 divisors (see below), whose sum is σ = 2951872632576. Its totient is φ = 348771139200.

The previous prime is 1212222021001. The next prime is 1212222021011. The reversal of 1212222021010 is 101202222121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1212222021011) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 5394486 + ... + 5614705.

It is an arithmetic number, because the mean of its divisors is an integer number (30748673256).

Almost surely, 2^{1212222021010} is an apocalyptic number.

1212222021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212222021010 is an abundant number, since it is smaller than the sum of its proper divisors (1739650611566).

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

1212222021010 is a wasteful number, since it uses less digits than its factorization.

1212222021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11009240 (or 11009229 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212222021010 its reverse (101202222121), we get a palindrome (1313424243131).

The spelling of 1212222021010 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, twenty-one thousand, ten".