20211121112 has 32 divisors (see below), whose sum is σ = 46641050400. Its totient is φ = 7995608064.

The previous prime is 20211121103. The next prime is 20211121121. The reversal of 20211121112 is 21112111202.

It is an interprime number because it is at equal distance from previous prime (20211121103) and next prime (20211121121).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13880537 + ... + 13881992.

It is an arithmetic number, because the mean of its divisors is an integer number (1457532825).

Almost surely, 2^20211121112 is an apocalyptic number.

It is an amenable number.

20211121112 is an abundant number, since it is smaller than the sum of its proper divisors (26429929288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211121112 is a wasteful number, since it uses less digits than its factorization.

20211121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27762555 (or 27762551 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20211121112 its reverse (21112111202), we get a palindrome (41323232314).

The spelling of 20211121112 in words is "twenty billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twelve".