102011222144 has 64 divisors (see below), whose sum is σ = 228373871040. Its totient is φ = 45035037696.

The previous prime is 102011222143. The next prime is 102011222153. The reversal of 102011222144 is 441222110201.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (102011222143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294442 + ... + 1370985.

It is an arithmetic number, because the mean of its divisors is an integer number (3568341735).

Almost surely, 2^102011222144 is an apocalyptic number.

It is an amenable number.

102011222144 is an abundant number, since it is smaller than the sum of its proper divisors (126362648896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102011222144 is a wasteful number, since it uses less digits than its factorization.

102011222144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665477 (or 2665465 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 102011222144 its reverse (441222110201), we get a palindrome (543233332345).

The spelling of 102011222144 in words is "one hundred two billion, eleven million, two hundred twenty-two thousand, one hundred forty-four".