102012010221 has 16 divisors (see below), whose sum is σ = 148445478720. Its totient is φ = 61798638720.

The previous prime is 102012010171. The next prime is 102012010223. The reversal of 102012010221 is 122010210201.

It is not a de Polignac number, because 102012010221 - 2¹⁸ = 102011748077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102012010197 and 102012010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012010223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593200 + ... + 745593.

It is an arithmetic number, because the mean of its divisors is an integer number (9277842420).

Almost surely, 2^102012010221 is an apocalyptic number.

102012010221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102012010221 is a deficient number, since it is larger than the sum of its proper divisors (46433468499).

102012010221 is a wasteful number, since it uses less digits than its factorization.

102012010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341116.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102012010221 its reverse (122010210201), we get a palindrome (224022220422).

The spelling of 102012010221 in words is "one hundred two billion, twelve million, ten thousand, two hundred twenty-one".