220120121000021 has 16 divisors (see below), whose sum is σ = 240577873018560. Its totient is φ = 199737132257280.

The previous prime is 220120121000009. The next prime is 220120121000069. The reversal of 220120121000021 is 120000121021022.

It is a cyclic number.

It is not a de Polignac number, because 220120121000021 - 2²² = 220120116805717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120121000081) 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, 7835315 + ... + 22397151.

It is an arithmetic number, because the mean of its divisors is an integer number (15036117063660).

Almost surely, 2^{220120121000021} is an apocalyptic number.

It is an amenable number.

220120121000021 is a deficient number, since it is larger than the sum of its proper divisors (20457752018539).

220120121000021 is a wasteful number, since it uses less digits than its factorization.

220120121000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14564404.

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

Adding to 220120121000021 its reverse (120000121021022), we get a palindrome (340120242021043).

The spelling of 220120121000021 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one", and thus it is an aban number.