102420231 has 4 divisors (see below), whose sum is σ = 136560312. Its totient is φ = 68280152.

The previous prime is 102420229. The next prime is 102420233. The reversal of 102420231 is 132024201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (102420229) and next prime (102420233).

It is a cyclic number.

It is not a de Polignac number, because 102420231 - 2¹ = 102420229 is a prime.

It is a super-2 number, since 2×102420231² = 20979807436186722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102420231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102420233) 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, 17070036 + ... + 17070041.

It is an arithmetic number, because the mean of its divisors is an integer number (34140078).

Almost surely, 2^102420231 is an apocalyptic number.

102420231 is a deficient number, since it is larger than the sum of its proper divisors (34140081).

102420231 is an equidigital number, since it uses as much as digits as its factorization.

102420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34140080.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 102420231 is about 10120.2880887848. The cubic root of 102420231 is about 467.8736463992.

Adding to 102420231 its reverse (132024201), we get a palindrome (234444432).

The spelling of 102420231 in words is "one hundred two million, four hundred twenty thousand, two hundred thirty-one".