20212213212121 has 8 divisors (see below), whose sum is σ = 23099725029440. Its totient is φ = 17324714591568.

The previous prime is 20212213212077. The next prime is 20212213212133. The reversal of 20212213212121 is 12121231221202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212213212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212213212092 and 20212213212101.

It is not an unprimeable number, because it can be changed into a prime (20212213212181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235255 + ... + 6362371.

It is an arithmetic number, because the mean of its divisors is an integer number (2887465628680).

Almost surely, 2^{20212213212121} is an apocalyptic number.

It is an amenable number.

20212213212121 is a deficient number, since it is larger than the sum of its proper divisors (2887511817319).

20212213212121 is an equidigital number, since it uses as much as digits as its factorization.

20212213212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598383.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20212213212121 its reverse (12121231221202), we get a palindrome (32333444433323).

The spelling of 20212213212121 in words is "twenty trillion, two hundred twelve billion, two hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".