102121223 has 4 divisors (see below), whose sum is σ = 105415488. Its totient is φ = 98826960.

The previous prime is 102121213. The next prime is 102121231. The reversal of 102121223 is 322121201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322121201 = 197 ⋅1635133.

It is a cyclic number.

It is not a de Polignac number, because 102121223 - 2⁴ = 102121207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121198 and 102121207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121213) 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, 1647086 + ... + 1647147.

It is an arithmetic number, because the mean of its divisors is an integer number (26353872).

Almost surely, 2^102121223 is an apocalyptic number.

102121223 is a deficient number, since it is larger than the sum of its proper divisors (3294265).

102121223 is an equidigital number, since it uses as much as digits as its factorization.

102121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294264.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102121223 is about 10105.5045890841. The cubic root of 102121223 is about 467.4178955396.

Adding to 102121223 its reverse (322121201), we get a palindrome (424242424).

The spelling of 102121223 in words is "one hundred two million, one hundred twenty-one thousand, two hundred twenty-three".