102023021 has 2 divisors, whose sum is σ = 102023022. Its totient is φ = 102023020.

The previous prime is 102022993. The next prime is 102023057. The reversal of 102023021 is 120320201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 25110121 = 8770^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 102023021 - 2¹⁴ = 102006637 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102022993 and 102023011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102023071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011510 + 51011511.

It is an arithmetic number, because the mean of its divisors is an integer number (51011511).

Almost surely, 2^102023021 is an apocalyptic number.

It is an amenable number.

102023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102023021 is an equidigital number, since it uses as much as digits as its factorization.

102023021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102023021 is about 10100.6445833917. The cubic root of 102023021 is about 467.2680210671.

Adding to 102023021 its reverse (120320201), we get a palindrome (222343222).

The spelling of 102023021 in words is "one hundred two million, twenty-three thousand, twenty-one".