2012220231157 has 2 divisors, whose sum is σ = 2012220231158. Its totient is φ = 2012220231156.

The previous prime is 2012220231137. The next prime is 2012220231251. The reversal of 2012220231157 is 7511320222102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1536176809476 + 476043421681 = 1239426^2 + 689959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012220231157 is a prime.

It is a super-3 number, since 3×2012220231157³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012220231137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006110115578 + 1006110115579.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110115579).

Almost surely, 2^{2012220231157} is an apocalyptic number.

It is an amenable number.

2012220231157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012220231157 is an equidigital number, since it uses as much as digits as its factorization.

2012220231157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 2012220231157 its reverse (7511320222102), we get a palindrome (9523540453259).

The spelling of 2012220231157 in words is "two trillion, twelve billion, two hundred twenty million, two hundred thirty-one thousand, one hundred fifty-seven".