212021110157 has 2 divisors, whose sum is σ = 212021110158. Its totient is φ = 212021110156.

The previous prime is 212021110129. The next prime is 212021110229. The reversal of 212021110157 is 751011120212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192079716361 + 19941393796 = 438269^2 + 141214^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021110157 - 2⁸ = 212021109901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021110757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010555078 + 106010555079.

It is an arithmetic number, because the mean of its divisors is an integer number (106010555079).

Almost surely, 2^212021110157 is an apocalyptic number.

It is an amenable number.

212021110157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021110157 is an equidigital number, since it uses as much as digits as its factorization.

212021110157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 212021110157 its reverse (751011120212), we get a palindrome (963032230369).

The spelling of 212021110157 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, one hundred fifty-seven".