102012221021 has 8 divisors (see below), whose sum is σ = 103562958240. Its totient is φ = 100462312368.

The previous prime is 102012221009. The next prime is 102012221033. The reversal of 102012221021 is 120122210201.

It is an interprime number because it is at equal distance from previous prime (102012221009) and next prime (102012221033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012221021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102012220987 and 102012221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012221081) 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, 43250 + ... + 453756.

It is an arithmetic number, because the mean of its divisors is an integer number (12945369780).

Almost surely, 2^102012221021 is an apocalyptic number.

It is an amenable number.

102012221021 is a deficient number, since it is larger than the sum of its proper divisors (1550737219).

102012221021 is an equidigital number, since it uses as much as digits as its factorization.

102012221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414283.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102012221021 its reverse (120122210201), we get a palindrome (222134431222).

The spelling of 102012221021 in words is "one hundred two billion, twelve million, two hundred twenty-one thousand, twenty-one".