1212002022221 has 8 divisors (see below), whose sum is σ = 1223411097024. Its totient is φ = 1200594465280.

The previous prime is 1212002022211. The next prime is 1212002022233. The reversal of 1212002022221 is 1222202002121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212002022221 - 2²² = 1211997827917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212002022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002022211) 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, 1258136 + ... + 2001726.

It is an arithmetic number, because the mean of its divisors is an integer number (152926387128).

Almost surely, 2^{1212002022221} is an apocalyptic number.

It is an amenable number.

1212002022221 is a deficient number, since it is larger than the sum of its proper divisors (11409074803).

1212002022221 is a wasteful number, since it uses less digits than its factorization.

1212002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758931.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1212002022221 its reverse (1222202002121), we get a palindrome (2434204024342).

The spelling of 1212002022221 in words is "one trillion, two hundred twelve billion, two million, twenty-two thousand, two hundred twenty-one".