20102110021221 has 8 divisors (see below), whose sum is σ = 26802835127424. Its totient is φ = 13401395797920.

The previous prime is 20102110021219. The next prime is 20102110021307. The reversal of 20102110021221 is 12212001120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102110021221 - 2¹ = 20102110021219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102110021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102110061221) 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, 3870081 + ... + 7428441.

It is an arithmetic number, because the mean of its divisors is an integer number (3350354390928).

Almost surely, 2^{20102110021221} is an apocalyptic number.

It is an amenable number.

20102110021221 is a deficient number, since it is larger than the sum of its proper divisors (6700725106203).

20102110021221 is a wasteful number, since it uses less digits than its factorization.

20102110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441451.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102110021221 its reverse (12212001120102), we get a palindrome (32314111141323).

The spelling of 20102110021221 in words is "twenty trillion, one hundred two billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".