102012155554 has 4 divisors (see below), whose sum is σ = 153018233334. Its totient is φ = 51006077776.

The previous prime is 102012155549. The next prime is 102012155569. The reversal of 102012155554 is 455551210201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455551210201 = 73 ⋅6240427537.

It can be written as a sum of positive squares in only one way, i.e., 87737402025 + 14274753529 = 296205^2 + 119477^2 .

It is a super-3 number, since 3×102012155554³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25503038887 + ... + 25503038890.

Almost surely, 2^102012155554 is an apocalyptic number.

102012155554 is a deficient number, since it is larger than the sum of its proper divisors (51006077780).

102012155554 is an equidigital number, since it uses as much as digits as its factorization.

102012155554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51006077779.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 102012155554 its reverse (455551210201), we get a palindrome (557563365755).

The spelling of 102012155554 in words is "one hundred two billion, twelve million, one hundred fifty-five thousand, five hundred fifty-four".