102121231 has 2 divisors, whose sum is σ = 102121232. Its totient is φ = 102121230.

The previous prime is 102121213. The next prime is 102121237. The reversal of 102121231 is 132121201.

Together with previous prime (102121213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (132121201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102121231 - 2⁹ = 102120719 is a prime.

It is a super-2 number, since 2×102121231² = 20857491641910722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060615 + 51060616.

It is an arithmetic number, because the mean of its divisors is an integer number (51060616).

Almost surely, 2^102121231 is an apocalyptic number.

102121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121231 is an equidigital number, since it uses as much as digits as its factorization.

102121231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102121231 is about 10105.5049849080. The cubic root of 102121231 is about 467.4179077452.

Adding to 102121231 its reverse (132121201), we get a palindrome (234242432).

The spelling of 102121231 in words is "one hundred two million, one hundred twenty-one thousand, two hundred thirty-one".