102020011021221 has 8 divisors (see below), whose sum is σ = 136861200879840. Its totient is φ = 67596080921712.

The previous prime is 102020011021193. The next prime is 102020011021241. The reversal of 102020011021221 is 122120110020201.

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

It is not a de Polignac number, because 102020011021221 - 2⁶ = 102020011021157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102020011021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020011021241) 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, 104314939206 + ... + 104314940183.

It is an arithmetic number, because the mean of its divisors is an integer number (17107650109980).

Almost surely, 2^{102020011021221} is an apocalyptic number.

It is an amenable number.

102020011021221 is a deficient number, since it is larger than the sum of its proper divisors (34841189858619).

102020011021221 is a wasteful number, since it uses less digits than its factorization.

102020011021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208629879555.

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

Adding to 102020011021221 its reverse (122120110020201), we get a palindrome (224140121041422).

The spelling of 102020011021221 in words is "one hundred two trillion, twenty billion, eleven million, twenty-one thousand, two hundred twenty-one".