20211121313 has 16 divisors (see below), whose sum is σ = 22627422720. Its totient is φ = 17940185856.

The previous prime is 20211121289. The next prime is 20211121327. The reversal of 20211121313 is 31312111202.

It is a cyclic number.

It is not a de Polignac number, because 20211121313 - 2²² = 20206927009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211121291 and 20211121300.

It is not an unprimeable number, because it can be changed into a prime (20211121013) 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 15 ways as a sum of consecutive naturals, for example, 68270 + ... + 212327.

It is an arithmetic number, because the mean of its divisors is an integer number (1414213920).

Almost surely, 2^20211121313 is an apocalyptic number.

It is an amenable number.

20211121313 is a deficient number, since it is larger than the sum of its proper divisors (2416301407).

20211121313 is a wasteful number, since it uses less digits than its factorization.

20211121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280856.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20211121313 its reverse (31312111202), we get a palindrome (51523232515).

The spelling of 20211121313 in words is "twenty billion, two hundred eleven million, one hundred twenty-one thousand, three hundred thirteen".