212001200002128 has 80 divisors (see below), whose sum is σ = 549435746718720. Its totient is φ = 70439229378048.

The previous prime is 212001200002121. The next prime is 212001200002129. The reversal of 212001200002128 is 821200002100212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001200002121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221020753 + ... + 221977871.

It is an arithmetic number, because the mean of its divisors is an integer number (6867946833984).

Almost surely, 2^{212001200002128} is an apocalyptic number.

It is an amenable number.

212001200002128 is an abundant number, since it is smaller than the sum of its proper divisors (337434546716592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212001200002128 is a wasteful number, since it uses less digits than its factorization.

212001200002128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972004 (or 971998 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 212001200002128 in words is "two hundred twelve trillion, one billion, two hundred million, two thousand, one hundred twenty-eight".