102121221230021 has 8 divisors (see below), whose sum is σ = 116714920411584. Its totient is φ = 87528760371360.

The previous prime is 102121221229861. The next prime is 102121221230023. The reversal of 102121221230021 is 120032122121201.

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

It is not a de Polignac number, because 102121221230021 - 2³⁰ = 102120147488197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121221229975 and 102121221230002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121221230023) 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, 309404000 + ... + 309733881.

It is an arithmetic number, because the mean of its divisors is an integer number (14589365051448).

Almost surely, 2^{102121221230021} is an apocalyptic number.

It is an amenable number.

102121221230021 is a deficient number, since it is larger than the sum of its proper divisors (14593699181563).

102121221230021 is an equidigital number, since it uses as much as digits as its factorization.

102121221230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619161451.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 102121221230021 its reverse (120032122121201), we get a palindrome (222153343351222).

The spelling of 102121221230021 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirty thousand, twenty-one".