1012212001221 has 8 divisors (see below), whose sum is σ = 1350023384640. Its totient is φ = 674604309312.

The previous prime is 1012212001193. The next prime is 1012212001223. The reversal of 1012212001221 is 1221002122101.

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

It is not a de Polignac number, because 1012212001221 - 2¹⁰ = 1012212000197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012212001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012212001223) 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, 50911281 + ... + 50931158.

It is an arithmetic number, because the mean of its divisors is an integer number (168752923080).

Almost surely, 2^{1012212001221} is an apocalyptic number.

It is an amenable number.

1012212001221 is a deficient number, since it is larger than the sum of its proper divisors (337811383419).

1012212001221 is a wasteful number, since it uses less digits than its factorization.

1012212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101845755.

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

Adding to 1012212001221 its reverse (1221002122101), we get a palindrome (2233214123322).

The spelling of 1012212001221 in words is "one trillion, twelve billion, two hundred twelve million, one thousand, two hundred twenty-one".