212102021028 has 24 divisors (see below), whose sum is σ = 495065017440. Its totient is φ = 70677773440.

The previous prime is 212102020993. The next prime is 212102021029. The reversal of 212102021028 is 820120201212.

It is a junction number, because it is equal to n+sod(n) for n = 212102020995 and 212102021013.

It is not an unprimeable number, because it can be changed into a prime (212102021029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823918 + ... + 2898053.

It is an arithmetic number, because the mean of its divisors is an integer number (20627709060).

Almost surely, 2^212102021028 is an apocalyptic number.

It is an amenable number.

212102021028 is an abundant number, since it is smaller than the sum of its proper divisors (282962996412).

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

212102021028 is a wasteful number, since it uses less digits than its factorization.

212102021028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725067 (or 5725065 counting only the distinct ones).

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

The spelling of 212102021028 in words is "two hundred twelve billion, one hundred two million, twenty-one thousand, twenty-eight".