212000022002021 has 4 divisors (see below), whose sum is σ = 231272751274944. Its totient is φ = 192727292729100.

The previous prime is 212000022002003. The next prime is 212000022002051. The reversal of 212000022002021 is 120200220000212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212000022002021 - 2¹⁰ = 212000022000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212000022001987 and 212000022002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000022002051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9636364636445 + ... + 9636364636466.

It is an arithmetic number, because the mean of its divisors is an integer number (57818187818736).

Almost surely, 2^{212000022002021} is an apocalyptic number.

It is an amenable number.

212000022002021 is a deficient number, since it is larger than the sum of its proper divisors (19272729272923).

212000022002021 is a wasteful number, since it uses less digits than its factorization.

212000022002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19272729272922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212000022002021 its reverse (120200220000212), we get a palindrome (332200242002233).

The spelling of 212000022002021 in words is "two hundred twelve trillion, twenty-two million, two thousand, twenty-one".