20211121107 has 16 divisors (see below), whose sum is σ = 29945091360. Its totient is φ = 13472870400.

The previous prime is 20211121103. The next prime is 20211121121. The reversal of 20211121107 is 70112111202.

It is not a de Polignac number, because 20211121107 - 2² = 20211121103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211121107.

It is not an unprimeable number, because it can be changed into a prime (20211121103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353607 + ... + 406767.

It is an arithmetic number, because the mean of its divisors is an integer number (1871568210).

Almost surely, 2^20211121107 is an apocalyptic number.

20211121107 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20211121107 is a deficient number, since it is larger than the sum of its proper divisors (9733970253).

20211121107 is a wasteful number, since it uses less digits than its factorization.

20211121107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67251 (or 67245 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

Adding to 20211121107 its reverse (70112111202), we get a palindrome (90323232309).

The spelling of 20211121107 in words is "twenty billion, two hundred eleven million, one hundred twenty-one thousand, one hundred seven".