102420042473 has 4 divisors (see below), whose sum is σ = 117051477120. Its totient is φ = 87788607828.

The previous prime is 102420042467. The next prime is 102420042481. The reversal of 102420042473 is 374240024201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102420042473 is a prime.

It is a super-2 number, since 2×102420042473² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102420042463) 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, 7315717313 + ... + 7315717326.

It is an arithmetic number, because the mean of its divisors is an integer number (29262869280).

Almost surely, 2^102420042473 is an apocalyptic number.

It is an amenable number.

102420042473 is a deficient number, since it is larger than the sum of its proper divisors (14631434647).

102420042473 is an equidigital number, since it uses as much as digits as its factorization.

102420042473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14631434646.

The product of its (nonzero) digits is 10752, while the sum is 29.

Adding to 102420042473 its reverse (374240024201), we get a palindrome (476660066674).

The spelling of 102420042473 in words is "one hundred two billion, four hundred twenty million, forty-two thousand, four hundred seventy-three".