212022222220021 has 16 divisors (see below), whose sum is σ = 221727383466624. Its totient is φ = 202357970648064.

The previous prime is 212022222219947. The next prime is 212022222220033. The reversal of 212022222220021 is 120022222220212.

It is a cyclic number.

It is not a de Polignac number, because 212022222220021 - 2³¹ = 212020074736373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212022222219974 and 212022222220001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022222220051) 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, 23338561 + ... + 31124473.

It is an arithmetic number, because the mean of its divisors is an integer number (13857961466664).

Almost surely, 2^{212022222220021} is an apocalyptic number.

It is an amenable number.

212022222220021 is a deficient number, since it is larger than the sum of its proper divisors (9705161246603).

212022222220021 is a wasteful number, since it uses less digits than its factorization.

212022222220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7788540.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 212022222220021 its reverse (120022222220212), we get a palindrome (332044444440233).

The spelling of 212022222220021 in words is "two hundred twelve trillion, twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, twenty-one".