102100021244 has 24 divisors (see below), whose sum is σ = 195055158480. Its totient is φ = 46477563264.

The previous prime is 102100021241. The next prime is 102100021259. The reversal of 102100021244 is 442120001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13444574 + ... + 13452165.

It is an arithmetic number, because the mean of its divisors is an integer number (8127298270).

Almost surely, 2^102100021244 is an apocalyptic number.

It is an amenable number.

102100021244 is a deficient number, since it is larger than the sum of its proper divisors (92955137236).

102100021244 is a wasteful number, since it uses less digits than its factorization.

102100021244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26896829 (or 26896827 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102100021244 its reverse (442120001201), we get a palindrome (544220022445).

The spelling of 102100021244 in words is "one hundred two billion, one hundred million, twenty-one thousand, two hundred forty-four".