1212012010221 has 8 divisors (see below), whose sum is σ = 1616134918944. Its totient is φ = 807948554160.

The previous prime is 1212012010171. The next prime is 1212012010291. The reversal of 1212012010221 is 1220102102121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212012010221 - 2⁹ = 1212012009709 is a prime.

It is a super-2 number, since 2×1212012010221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212012010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212012010291) 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, 14815575 + ... + 14897156.

It is an arithmetic number, because the mean of its divisors is an integer number (202016864868).

Almost surely, 2^{1212012010221} is an apocalyptic number.

It is an amenable number.

1212012010221 is a deficient number, since it is larger than the sum of its proper divisors (404122908723).

1212012010221 is a wasteful number, since it uses less digits than its factorization.

1212012010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29726331.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212012010221 its reverse (1220102102121), we get a palindrome (2432114112342).

The spelling of 1212012010221 in words is "one trillion, two hundred twelve billion, twelve million, ten thousand, two hundred twenty-one".