102210012001021 has 4 divisors (see below), whose sum is σ = 105734495173500. Its totient is φ = 98685528828544.

The previous prime is 102210012000991. The next prime is 102210012001039. The reversal of 102210012001021 is 120100210012201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21435844372996 + 80774167628025 = 4629886^2 + 8987445^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210012001021 - 2³¹ = 102207864517373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102210012000992 and 102210012001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210012001051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762241586196 + ... + 1762241586253.

It is an arithmetic number, because the mean of its divisors is an integer number (26433623793375).

Almost surely, 2^{102210012001021} is an apocalyptic number.

It is an amenable number.

102210012001021 is a deficient number, since it is larger than the sum of its proper divisors (3524483172479).

102210012001021 is an equidigital number, since it uses as much as digits as its factorization.

102210012001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524483172478.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102210012001021 its reverse (120100210012201), we get a palindrome (222310222013222).

The spelling of 102210012001021 in words is "one hundred two trillion, two hundred ten billion, twelve million, one thousand, twenty-one".