20011121192 has 64 divisors (see below), whose sum is σ = 40667235840. Its totient is φ = 9195289600.

The previous prime is 20011121189. The next prime is 20011121203. The reversal of 20011121192 is 29112111002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2943317 + ... + 2950107.

It is an arithmetic number, because the mean of its divisors is an integer number (635425560).

Almost surely, 2^20011121192 is an apocalyptic number.

It is an amenable number.

20011121192 is an abundant number, since it is smaller than the sum of its proper divisors (20656114648).

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

20011121192 is a wasteful number, since it uses less digits than its factorization.

20011121192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7322 (or 7318 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20011121192 its reverse (29112111002), we get a palindrome (49123232194).

The spelling of 20011121192 in words is "twenty billion, eleven million, one hundred twenty-one thousand, one hundred ninety-two".