20010122192 has 20 divisors (see below), whose sum is σ = 38802146340. Its totient is φ = 9996665088.

The previous prime is 20010122189. The next prime is 20010122261. The reversal of 20010122192 is 29122101002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3570779536 + 16439342656 = 59756^2 + 128216^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505067 + ... + 543242.

It is an arithmetic number, because the mean of its divisors is an integer number (1940107317).

Almost surely, 2^20010122192 is an apocalyptic number.

It is an amenable number.

20010122192 is a deficient number, since it is larger than the sum of its proper divisors (18792024148).

20010122192 is a wasteful number, since it uses less digits than its factorization.

20010122192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049510 (or 1049504 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20010122192 its reverse (29122101002), we get a palindrome (49132223194).

The spelling of 20010122192 in words is "twenty billion, ten million, one hundred twenty-two thousand, one hundred ninety-two".