1212021221012 has 24 divisors (see below), whose sum is σ = 2424320250240. Its totient is φ = 519378135840.

The previous prime is 1212021221011. The next prime is 1212021221023. The reversal of 1212021221012 is 2101221202121.

It is a super-3 number, since 3×1212021221012³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021221011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2231312 + ... + 2720807.

It is an arithmetic number, because the mean of its divisors is an integer number (101013343760).

Almost surely, 2^{1212021221012} is an apocalyptic number.

It is an amenable number.

1212021221012 is an abundant number, since it is smaller than the sum of its proper divisors (1212299029228).

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

1212021221012 is a wasteful number, since it uses less digits than its factorization.

1212021221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960871 (or 4960869 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212021221012 its reverse (2101221202121), we get a palindrome (3313242423133).

The spelling of 1212021221012 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, twelve".