102020221100021 has 8 divisors (see below), whose sum is σ = 116754916037760. Its totient is φ = 87325620571728.

The previous prime is 102020221099967. The next prime is 102020221100023. The reversal of 102020221100021 is 120001122020201.

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

It is not a de Polignac number, because 102020221100021 - 2⁶ = 102020221099957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020221099969 and 102020221100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020221100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10023596906 + ... + 10023607083.

It is an arithmetic number, because the mean of its divisors is an integer number (14594364504720).

Almost surely, 2^{102020221100021} is an apocalyptic number.

It is an amenable number.

102020221100021 is a deficient number, since it is larger than the sum of its proper divisors (14734694937739).

102020221100021 is an equidigital number, since it uses as much as digits as its factorization.

102020221100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20047204723.

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

Adding to 102020221100021 its reverse (120001122020201), we get a palindrome (222021343120222).

The spelling of 102020221100021 in words is "one hundred two trillion, twenty billion, two hundred twenty-one million, one hundred thousand, twenty-one".