20121020222021 has 8 divisors (see below), whose sum is σ = 20611927400064. Its totient is φ = 19630120214880.

The previous prime is 20121020221943. The next prime is 20121020222027. The reversal of 20121020222021 is 12022202012102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20121020222021 - 2³⁴ = 20103840352837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121020222027) 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, 4122830 + ... + 7565696.

It is an arithmetic number, because the mean of its divisors is an integer number (2576490925008).

Almost surely, 2^{20121020222021} is an apocalyptic number.

It is an amenable number.

20121020222021 is a deficient number, since it is larger than the sum of its proper divisors (490907178043).

20121020222021 is a wasteful number, since it uses less digits than its factorization.

20121020222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585451.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121020222021 its reverse (12022202012102), we get a palindrome (32143222234123).

The spelling of 20121020222021 in words is "twenty trillion, one hundred twenty-one billion, twenty million, two hundred twenty-two thousand, twenty-one".