21212122021022 has 8 divisors (see below), whose sum is σ = 31818759477816. Its totient is φ = 10605868861752.

The previous prime is 21212122021003. The next prime is 21212122021093. The reversal of 21212122021022 is 22012022121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21212122020985 and 21212122021003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95936348 + ... + 96157199.

It is an arithmetic number, because the mean of its divisors is an integer number (3977344934727).

Almost surely, 2^{21212122021022} is an apocalyptic number.

21212122021022 is a deficient number, since it is larger than the sum of its proper divisors (10606637456794).

21212122021022 is a wasteful number, since it uses less digits than its factorization.

21212122021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192148762.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212122021022 its reverse (22012022121212), we get a palindrome (43224144142234).

The spelling of 21212122021022 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, twenty-one thousand, twenty-two".