102000020021221 has 8 divisors (see below), whose sum is σ = 120331820854784. Its totient is φ = 84608311538160.

The previous prime is 102000020021219. The next prime is 102000020021231. The reversal of 102000020021221 is 122120020000201.

It is a happy number.

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 102000020021221 - 2¹ = 102000020021219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000020021231) 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, 235023087390 + ... + 235023087823.

It is an arithmetic number, because the mean of its divisors is an integer number (15041477606848).

Almost surely, 2^{102000020021221} is an apocalyptic number.

It is an amenable number.

102000020021221 is a deficient number, since it is larger than the sum of its proper divisors (18331800833563).

102000020021221 is an equidigital number, since it uses as much as digits as its factorization.

102000020021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470046175251.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102000020021221 its reverse (122120020000201), we get a palindrome (224120040021422).

The spelling of 102000020021221 in words is "one hundred two trillion, twenty million, twenty-one thousand, two hundred twenty-one".