212010222000021 has 16 divisors (see below), whose sum is σ = 299918138453568. Its totient is φ = 132755092870400.

The previous prime is 212010221999899. The next prime is 212010222000029. The reversal of 212010222000021 is 120000222010212.

It is a cyclic number.

It is not a de Polignac number, because 212010222000021 - 2¹⁰ = 212010221998997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010222000029) 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, 4233236850 + ... + 4233286931.

It is an arithmetic number, because the mean of its divisors is an integer number (18744883653348).

Almost surely, 2^{212010222000021} is an apocalyptic number.

It is an amenable number.

212010222000021 is a deficient number, since it is larger than the sum of its proper divisors (87907916453547).

212010222000021 is a wasteful number, since it uses less digits than its factorization.

212010222000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8466524292.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212010222000021 its reverse (120000222010212), we get a palindrome (332010444010233).

The spelling of 212010222000021 in words is "two hundred twelve trillion, ten billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.