102100021010 has 32 divisors (see below), whose sum is σ = 197996106672. Its totient is φ = 37683394560.

The previous prime is 102100020989. The next prime is 102100021019. The reversal of 102100021010 is 10120001201.

It can be written as a sum of positive squares in 8 ways, for example, as 18944494321 + 83155526689 = 137639^2 + 288367^2 .

It is not an unprimeable number, because it can be changed into a prime (102100021019) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 171962 + ... + 483498.

Almost surely, 2^102100021010 is an apocalyptic number.

102100021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102100021010 is a deficient number, since it is larger than the sum of its proper divisors (95896085662).

102100021010 is a wasteful number, since it uses less digits than its factorization.

102100021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314078.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102100021010 its reverse (10120001201), we get a palindrome (112220022211).

The spelling of 102100021010 in words is "one hundred two billion, one hundred million, twenty-one thousand, ten".