20020101001221 has 8 divisors (see below), whose sum is σ = 26693490721824. Its totient is φ = 13346722640720.

The previous prime is 20020101001213. The next prime is 20020101001283. The reversal of 20020101001221 is 12210010102002.

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 20020101001221 - 2³ = 20020101001213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020101001197 and 20020101001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020101041221) 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, 2970106 + ... + 6990116.

It is an arithmetic number, because the mean of its divisors is an integer number (3336686340228).

Almost surely, 2^{20020101001221} is an apocalyptic number.

It is an amenable number.

20020101001221 is a deficient number, since it is larger than the sum of its proper divisors (6673389720603).

20020101001221 is a wasteful number, since it uses less digits than its factorization.

20020101001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680051.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20020101001221 its reverse (12210010102002), we get a palindrome (32230111103223).

The spelling of 20020101001221 in words is "twenty trillion, twenty billion, one hundred one million, one thousand, two hundred twenty-one".