102135254044 has 12 divisors (see below), whose sum is σ = 178749495568. Its totient is φ = 51063969600.

The previous prime is 102135254041. The next prime is 102135254051. The reversal of 102135254044 is 440452531201.

It is a super-2 number, since 2×102135254044² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102135253997 and 102135254015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102135254041) 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, 851037 + ... + 963604.

Almost surely, 2^102135254044 is an apocalyptic number.

It is an amenable number.

102135254044 is a deficient number, since it is larger than the sum of its proper divisors (76614241524).

102135254044 is a wasteful number, since it uses less digits than its factorization.

102135254044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828716 (or 1828714 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 102135254044 its reverse (440452531201), we get a palindrome (542587785245).

The spelling of 102135254044 in words is "one hundred two billion, one hundred thirty-five million, two hundred fifty-four thousand, forty-four".