1212222222001 has 16 divisors (see below), whose sum is σ = 1471691478400. Its totient is φ = 975330056448.

The previous prime is 1212222221983. The next prime is 1212222222007. The reversal of 1212222222001 is 1002222222121.

It is a cyclic number.

It is not a de Polignac number, because 1212222222001 - 2⁹ = 1212222221489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 1212222222001.

It is not an unprimeable number, because it can be changed into a prime (1212222222007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41794920 + ... + 41823913.

It is an arithmetic number, because the mean of its divisors is an integer number (91980717400).

Almost surely, 2^{1212222222001} is an apocalyptic number.

It is an amenable number.

1212222222001 is a deficient number, since it is larger than the sum of its proper divisors (259469256399).

1212222222001 is a wasteful number, since it uses less digits than its factorization.

1212222222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83618968.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212222222001 its reverse (1002222222121), we get a palindrome (2214444444122).

The spelling of 1212222222001 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one".