1220000112101 has 4 divisors (see below), whose sum is σ = 1220017149900. Its totient is φ = 1219983074304.

The previous prime is 1220000112043. The next prime is 1220000112103. The reversal of 1220000112101 is 1012110000221.

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 398350322500 + 821649789601 = 631150^2 + 906449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220000112101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000112103) 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, 8411036 + ... + 8554853.

It is an arithmetic number, because the mean of its divisors is an integer number (305004287475).

Almost surely, 2^{1220000112101} is an apocalyptic number.

It is an amenable number.

1220000112101 is a deficient number, since it is larger than the sum of its proper divisors (17037799).

1220000112101 is an equidigital number, since it uses as much as digits as its factorization.

1220000112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17037798.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220000112101 its reverse (1012110000221), we get a palindrome (2232110112322).

The spelling of 1220000112101 in words is "one trillion, two hundred twenty billion, one hundred twelve thousand, one hundred one".