20102212201021 has 16 divisors (see below), whose sum is σ = 20410548433920. Its totient is φ = 19794773243520.

The previous prime is 20102212200991. The next prime is 20102212201031. The reversal of 20102212201021 is 12010221220102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20102212201021 - 2¹⁷ = 20102212069949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102212200986 and 20102212201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102212201031) 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, 683199516 + ... + 683228938.

It is an arithmetic number, because the mean of its divisors is an integer number (1275659277120).

Almost surely, 2^{20102212201021} is an apocalyptic number.

It is an amenable number.

20102212201021 is a deficient number, since it is larger than the sum of its proper divisors (308336232899).

20102212201021 is a wasteful number, since it uses less digits than its factorization.

20102212201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44316.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20102212201021 its reverse (12010221220102), we get a palindrome (32112433421123).

The spelling of 20102212201021 in words is "twenty trillion, one hundred two billion, two hundred twelve million, two hundred one thousand, twenty-one".