1212202221009 has 16 divisors (see below), whose sum is σ = 1745340855552. Its totient is φ = 743937971328.

The previous prime is 1212202220987. The next prime is 1212202221011. The reversal of 1212202221009 is 9001222022121.

It is not a de Polignac number, because 1212202221009 - 2¹² = 1212202216913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212202221009.

It is not an unprimeable number, because it can be changed into a prime (1212202221059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42331884 + ... + 42360509.

It is an arithmetic number, because the mean of its divisors is an integer number (109083803472).

Almost surely, 2^{1212202221009} is an apocalyptic number.

It is an amenable number.

1212202221009 is a deficient number, since it is larger than the sum of its proper divisors (533138634543).

1212202221009 is a wasteful number, since it uses less digits than its factorization.

1212202221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84692776.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 1212202221009 in words is "one trillion, two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, nine".