128212472237 has 2 divisors, whose sum is σ = 128212472238. Its totient is φ = 128212472236.

The previous prime is 128212472233. The next prime is 128212472317. The reversal of 128212472237 is 732274212821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121085904676 + 7126567561 = 347974^2 + 84419^2 .

It is a cyclic number.

It is not a de Polignac number, because 128212472237 - 2² = 128212472233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128212472194 and 128212472203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128212472233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64106236118 + 64106236119.

It is an arithmetic number, because the mean of its divisors is an integer number (64106236119).

Almost surely, 2^128212472237 is an apocalyptic number.

It is an amenable number.

128212472237 is a deficient number, since it is larger than the sum of its proper divisors (1).

128212472237 is an equidigital number, since it uses as much as digits as its factorization.

128212472237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 41.

The spelling of 128212472237 in words is "one hundred twenty-eight billion, two hundred twelve million, four hundred seventy-two thousand, two hundred thirty-seven".