102101210028 has 36 divisors (see below), whose sum is σ = 258506171560. Its totient is φ = 33978747456.

The previous prime is 102101210021. The next prime is 102101210089. The reversal of 102101210028 is 820012101201.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102101210021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2268625 + ... + 2313192.

Almost surely, 2^102101210028 is an apocalyptic number.

102101210028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

102101210028 is an abundant number, since it is smaller than the sum of its proper divisors (156404961532).

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

102101210028 is a wasteful number, since it uses less digits than its factorization.

102101210028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582446 (or 4582441 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102101210028 its reverse (820012101201), we get a palindrome (922113311229).

The spelling of 102101210028 in words is "one hundred two billion, one hundred one million, two hundred ten thousand, twenty-eight".