1000120221101 has 8 divisors (see below), whose sum is σ = 1006930325400. Its totient is φ = 993311422272.

The previous prime is 1000120221091. The next prime is 1000120221109. The reversal of 1000120221101 is 1011220210001.

It can be written as a sum of positive squares in 4 ways, for example, as 514987075876 + 485133145225 = 717626^2 + 696515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000120221101 is a prime.

It is a super-2 number, since 2×1000120221101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000120221109) 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, 1236431 + ... + 1878563.

It is an arithmetic number, because the mean of its divisors is an integer number (125866290675).

Almost surely, 2^{1000120221101} is an apocalyptic number.

It is an amenable number.

1000120221101 is a deficient number, since it is larger than the sum of its proper divisors (6810104299).

1000120221101 is a wasteful number, since it uses less digits than its factorization.

1000120221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652735.

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

Adding to 1000120221101 its reverse (1011220210001), we get a palindrome (2011340431102).

It can be divided in two parts, 1000120 and 221101, that added together give a palindrome (1221221).

The spelling of 1000120221101 in words is "one trillion, one hundred twenty million, two hundred twenty-one thousand, one hundred one".