102420131 has 4 divisors (see below), whose sum is σ = 111731064. Its totient is φ = 93109200.

The previous prime is 102420119. The next prime is 102420133. The reversal of 102420131 is 131024201.

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

It is a cyclic number.

It is not a de Polignac number, because 102420131 - 2¹⁴ = 102403747 is a prime.

It is a super-2 number, since 2×102420131² = 20979766468114322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102420133) 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, 4655450 + ... + 4655471.

It is an arithmetic number, because the mean of its divisors is an integer number (27932766).

Almost surely, 2^102420131 is an apocalyptic number.

102420131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102420131 is a deficient number, since it is larger than the sum of its proper divisors (9310933).

102420131 is an equidigital number, since it uses as much as digits as its factorization.

102420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310932.

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

The square root of 102420131 is about 10120.2831482128. The cubic root of 102420131 is about 467.8734941266.

Adding to 102420131 its reverse (131024201), we get a palindrome (233444332).

The spelling of 102420131 in words is "one hundred two million, four hundred twenty thousand, one hundred thirty-one".