2101331203121 has 8 divisors (see below), whose sum is σ = 2105553969960. Its totient is φ = 2097108807552.

The previous prime is 2101331203091. The next prime is 2101331203141. The reversal of 2101331203121 is 1213021331012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 613026361600 + 1488304841521 = 782960^2 + 1219961^2 .

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-2101331203121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101331203093 and 2101331203102.

It is not an unprimeable number, because it can be changed into a prime (2101331203141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13120301 + ... + 13279493.

It is an arithmetic number, because the mean of its divisors is an integer number (263194246245).

Almost surely, 2^{2101331203121} is an apocalyptic number.

It is an amenable number.

2101331203121 is a deficient number, since it is larger than the sum of its proper divisors (4222766839).

2101331203121 is a wasteful number, since it uses less digits than its factorization.

2101331203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185635.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2101331203121 its reverse (1213021331012), we get a palindrome (3314352534133).

The spelling of 2101331203121 in words is "two trillion, one hundred one billion, three hundred thirty-one million, two hundred three thousand, one hundred twenty-one".