1200100222001 has 4 divisors (see below), whose sum is σ = 1263263391600. Its totient is φ = 1136937052404.

The previous prime is 1200100221979. The next prime is 1200100222003. The reversal of 1200100222001 is 1002220010021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200100222001 - 2³⁸ = 925222315057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200100222003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31581584771 + ... + 31581584808.

It is an arithmetic number, because the mean of its divisors is an integer number (315815847900).

Almost surely, 2^{1200100222001} is an apocalyptic number.

It is an amenable number.

1200100222001 is a deficient number, since it is larger than the sum of its proper divisors (63163169599).

1200100222001 is an equidigital number, since it uses as much as digits as its factorization.

1200100222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63163169598.

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

Adding to 1200100222001 its reverse (1002220010021), we get a palindrome (2202320232022).

The spelling of 1200100222001 in words is "one trillion, two hundred billion, one hundred million, two hundred twenty-two thousand, one".