1200201101021 has 8 divisors (see below), whose sum is σ = 1292538376920. Its totient is φ = 1107865841472.

The previous prime is 1200201101009. The next prime is 1200201101051. The reversal of 1200201101021 is 1201011020021.

It can be written as a sum of positive squares in 4 ways, for example, as 8970741796 + 1191230359225 = 94714^2 + 1091435^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1200201101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200201100993 and 1200201101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200201101051) 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, 871151 + ... + 1777443.

It is an arithmetic number, because the mean of its divisors is an integer number (161567297115).

Almost surely, 2^{1200201101021} is an apocalyptic number.

It is an amenable number.

1200201101021 is a deficient number, since it is larger than the sum of its proper divisors (92337275899).

1200201101021 is a wasteful number, since it uses less digits than its factorization.

1200201101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008175.

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

Adding to 1200201101021 its reverse (1201011020021), we get a palindrome (2401212121042).

The spelling of 1200201101021 in words is "one trillion, two hundred billion, two hundred one million, one hundred one thousand, twenty-one".