1200002122001 has 8 divisors (see below), whose sum is σ = 1242619486464. Its totient is φ = 1157628983760.

The previous prime is 1200002121991. The next prime is 1200002122043. The reversal of 1200002122001 is 1002212000021.

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 1200002122001 - 2²² = 1199997927697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200002122201) 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, 61046555 + ... + 61066208.

It is an arithmetic number, because the mean of its divisors is an integer number (155327435808).

Almost surely, 2^{1200002122001} is an apocalyptic number.

It is an amenable number.

1200002122001 is a deficient number, since it is larger than the sum of its proper divisors (42617364463).

1200002122001 is a wasteful number, since it uses less digits than its factorization.

1200002122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122113111.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200002122001 its reverse (1002212000021), we get a palindrome (2202214122022).

The spelling of 1200002122001 in words is "one trillion, two hundred billion, two million, one hundred twenty-two thousand, one".