102021121 has 4 divisors (see below), whose sum is σ = 102046000. Its totient is φ = 101996244.

The previous prime is 102021113. The next prime is 102021133. The reversal of 102021121 is 121120201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121120201 = 2083 ⋅58147.

It is a cyclic number.

It is not a de Polignac number, because 102021121 - 2³ = 102021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021098 and 102021107.

It is not an unprimeable number, because it can be changed into a prime (102021421) 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, 4671 + ... + 15028.

It is an arithmetic number, because the mean of its divisors is an integer number (25511500).

Almost surely, 2^102021121 is an apocalyptic number.

It is an amenable number.

102021121 is a deficient number, since it is larger than the sum of its proper divisors (24879).

102021121 is an equidigital number, since it uses as much as digits as its factorization.

102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24878.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 102021121 is about 10100.5505295504. The cubic root of 102021121 is about 467.2651203664.

Adding to 102021121 its reverse (121120201), we get a palindrome (223141322).

The spelling of 102021121 in words is "one hundred two million, twenty-one thousand, one hundred twenty-one".