2121611020507 has 4 divisors (see below), whose sum is σ = 2314484749656. Its totient is φ = 1928737291360.

The previous prime is 2121611020447. The next prime is 2121611020519. The reversal of 2121611020507 is 7050201161212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2121611020507 - 2¹¹ = 2121611018459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121611020567) 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, 96436864558 + ... + 96436864579.

It is an arithmetic number, because the mean of its divisors is an integer number (578621187414).

Almost surely, 2^{2121611020507} is an apocalyptic number.

2121611020507 is a deficient number, since it is larger than the sum of its proper divisors (192873729149).

2121611020507 is a wasteful number, since it uses less digits than its factorization.

2121611020507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192873729148.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 2121611020507 its reverse (7050201161212), we get a palindrome (9171812181719).

The spelling of 2121611020507 in words is "two trillion, one hundred twenty-one billion, six hundred eleven million, twenty thousand, five hundred seven".