20121054003157 has 2 divisors, whose sum is σ = 20121054003158. Its totient is φ = 20121054003156.

The previous prime is 20121054003143. The next prime is 20121054003163. The reversal of 20121054003157 is 75130045012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18047874461841 + 2073179541316 = 4248279^2 + 1439854^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121054003157 - 2¹¹ = 20121054001109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121054003257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060527001578 + 10060527001579.

It is an arithmetic number, because the mean of its divisors is an integer number (10060527001579).

Almost surely, 2^{20121054003157} is an apocalyptic number.

It is an amenable number.

20121054003157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121054003157 is an equidigital number, since it uses as much as digits as its factorization.

20121054003157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 20121054003157 its reverse (75130045012102), we get a palindrome (95251099015259).

The spelling of 20121054003157 in words is "twenty trillion, one hundred twenty-one billion, fifty-four million, three thousand, one hundred fifty-seven".