20020112112157 has 2 divisors, whose sum is σ = 20020112112158. Its totient is φ = 20020112112156.

The previous prime is 20020112112151. The next prime is 20020112112269. The reversal of 20020112112157 is 75121121102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19617910082521 + 402202029636 = 4429211^2 + 634194^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020112112157 - 2¹⁵ = 20020112079389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020112112151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010056056078 + 10010056056079.

It is an arithmetic number, because the mean of its divisors is an integer number (10010056056079).

Almost surely, 2^{20020112112157} is an apocalyptic number.

It is an amenable number.

20020112112157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020112112157 is an equidigital number, since it uses as much as digits as its factorization.

20020112112157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 20020112112157 its reverse (75121121102002), we get a palindrome (95141233214159).

The spelling of 20020112112157 in words is "twenty trillion, twenty billion, one hundred twelve million, one hundred twelve thousand, one hundred fifty-seven".