102021321122121 has 4 divisors (see below), whose sum is σ = 136028428162832. Its totient is φ = 68014214081412.

The previous prime is 102021321122111. The next prime is 102021321122131. The reversal of 102021321122121 is 121221123120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (102021321122111) and next prime (102021321122131).

It is not a de Polignac number, because 102021321122121 - 2²¹ = 102021319024969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021321122111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003553520351 + ... + 17003553520356.

It is an arithmetic number, because the mean of its divisors is an integer number (34007107040708).

Almost surely, 2^{102021321122121} is an apocalyptic number.

It is an amenable number.

102021321122121 is a deficient number, since it is larger than the sum of its proper divisors (34007107040711).

102021321122121 is an equidigital number, since it uses as much as digits as its factorization.

102021321122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34007107040710.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 102021321122121 its reverse (121221123120201), we get a palindrome (223242444242322).

The spelling of 102021321122121 in words is "one hundred two trillion, twenty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".