221020120000121 has 8 divisors (see below), whose sum is σ = 238021920905664. Its totient is φ = 204018355267920.

The previous prime is 221020120000111. The next prime is 221020120000153. The reversal of 221020120000121 is 121000021020122.

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 221020120000121 - 2²² = 221020115805817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221020120000096 and 221020120000105.

It is not an unprimeable number, because it can be changed into a prime (221020120000111) 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, 4385270 + ... + 21477216.

It is an arithmetic number, because the mean of its divisors is an integer number (29752740113208).

Almost surely, 2^{221020120000121} is an apocalyptic number.

It is an amenable number.

221020120000121 is a deficient number, since it is larger than the sum of its proper divisors (17001800905543).

221020120000121 is a wasteful number, since it uses less digits than its factorization.

221020120000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18086671.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020120000121 its reverse (121000021020122), we get a palindrome (342020141020243).

The spelling of 221020120000121 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty million, one hundred twenty-one", and thus it is an aban number.