212010012021021 has 16 divisors (see below), whose sum is σ = 288014998826304. Its totient is φ = 138672542496384.

The previous prime is 212010012020857. The next prime is 212010012021043. The reversal of 212010012021021 is 120120210010212.

It is not a de Polignac number, because 212010012021021 - 2¹⁹ = 212010011496733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010012021721) 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, 30753810 + ... + 37011036.

It is an arithmetic number, because the mean of its divisors is an integer number (18000937426644).

Almost surely, 2^{212010012021021} is an apocalyptic number.

It is an amenable number.

212010012021021 is a deficient number, since it is larger than the sum of its proper divisors (76004986805283).

212010012021021 is a wasteful number, since it uses less digits than its factorization.

212010012021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470380.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212010012021021 its reverse (120120210010212), we get a palindrome (332130222031233).

The spelling of 212010012021021 in words is "two hundred twelve trillion, ten billion, twelve million, twenty-one thousand, twenty-one".