1200111210101 has 4 divisors (see below), whose sum is σ = 1200992997804. Its totient is φ = 1199229422400.

The previous prime is 1200111210097. The next prime is 1200111210121. The reversal of 1200111210101 is 1010121110021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162465424900 + 1037645785201 = 403070^2 + 1018649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200111210101 - 2² = 1200111210097 is a prime.

It is a super-2 number, since 2×1200111210101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111210121) 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 3 ways as a sum of consecutive naturals, for example, 440891810 + ... + 440894531.

It is an arithmetic number, because the mean of its divisors is an integer number (300248249451).

Almost surely, 2^{1200111210101} is an apocalyptic number.

It is an amenable number.

1200111210101 is a deficient number, since it is larger than the sum of its proper divisors (881787703).

1200111210101 is an equidigital number, since it uses as much as digits as its factorization.

1200111210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881787702.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1200111210101 its reverse (1010121110021), we get a palindrome (2210232320122).

The spelling of 1200111210101 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred ten thousand, one hundred one".