2121031133153 has 4 divisors (see below), whose sum is σ = 2121087442068. Its totient is φ = 2120974824240.

The previous prime is 2121031133141. The next prime is 2121031133161. The reversal of 2121031133153 is 3513311301212.

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 243341930209 + 1877689202944 = 493297^2 + 1370288^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121031133153 - 2¹² = 2121031129057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121031133113) 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, 28097918 + ... + 28173303.

It is an arithmetic number, because the mean of its divisors is an integer number (530271860517).

Almost surely, 2^{2121031133153} is an apocalyptic number.

It is an amenable number.

2121031133153 is a deficient number, since it is larger than the sum of its proper divisors (56308915).

2121031133153 is an equidigital number, since it uses as much as digits as its factorization.

2121031133153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56308914.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 2121031133153 its reverse (3513311301212), we get a palindrome (5634342434365).

The spelling of 2121031133153 in words is "two trillion, one hundred twenty-one billion, thirty-one million, one hundred thirty-three thousand, one hundred fifty-three".