20020101012221 has 8 divisors (see below), whose sum is σ = 21108168676320. Its totient is φ = 18935471161872.

The previous prime is 20020101012181. The next prime is 20020101012251. The reversal of 20020101012221 is 12221010102002.

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 20020101012221 - 2⁶ = 20020101012157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020101012196 and 20020101012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020101012251) 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, 859441475 + ... + 859464768.

It is an arithmetic number, because the mean of its divisors is an integer number (2638521084540).

Almost surely, 2^{20020101012221} is an apocalyptic number.

It is an amenable number.

20020101012221 is a deficient number, since it is larger than the sum of its proper divisors (1088067664099).

20020101012221 is a wasteful number, since it uses less digits than its factorization.

20020101012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718906875.

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

Adding to 20020101012221 its reverse (12221010102002), we get a palindrome (32241111114223).

The spelling of 20020101012221 in words is "twenty trillion, twenty billion, one hundred one million, twelve thousand, two hundred twenty-one".