220101221021 has 16 divisors (see below), whose sum is σ = 246006993408. Its totient is φ = 195190052400.

The previous prime is 220101220949. The next prime is 220101221023. The reversal of 220101221021 is 120122101022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220101221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220101220987 and 220101221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220101221023) 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, 76616 + ... + 667886.

It is an arithmetic number, because the mean of its divisors is an integer number (15375437088).

Almost surely, 2^220101221021 is an apocalyptic number.

It is an amenable number.

220101221021 is a deficient number, since it is larger than the sum of its proper divisors (25905772387).

220101221021 is a wasteful number, since it uses less digits than its factorization.

220101221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592112.

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

Adding to 220101221021 its reverse (120122101022), we get a palindrome (340223322043).

The spelling of 220101221021 in words is "two hundred twenty billion, one hundred one million, two hundred twenty-one thousand, twenty-one".