201100212128 has 12 divisors (see below), whose sum is σ = 395916042690. Its totient is φ = 100550106048.

The previous prime is 201100212121. The next prime is 201100212149. The reversal of 201100212128 is 821212001102.

It can be written as a sum of positive squares in only one way, i.e., 169964903824 + 31135308304 = 412268^2 + 176452^2 .

It is not an unprimeable number, because it can be changed into a prime (201100212121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3142190783 + ... + 3142190846.

Almost surely, 2^201100212128 is an apocalyptic number.

It is an amenable number.

201100212128 is a deficient number, since it is larger than the sum of its proper divisors (194815830562).

201100212128 is an equidigital number, since it uses as much as digits as its factorization.

201100212128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6284381639 (or 6284381631 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 201100212128 in words is "two hundred one billion, one hundred million, two hundred twelve thousand, one hundred twenty-eight".