102012221002 has 4 divisors (see below), whose sum is σ = 153018331506. Its totient is φ = 51006110500.

The previous prime is 102012220993. The next prime is 102012221009. The reversal of 102012221002 is 200122210201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200122210201 = 29 ⋅6900765869.

It can be written as a sum of positive squares in only one way, i.e., 88416427801 + 13595793201 = 297349^2 + 116601^2 .

It is not an unprimeable number, because it can be changed into a prime (102012221009) 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 as a sum of consecutive naturals, namely, 25503055249 + ... + 25503055252.

Almost surely, 2^102012221002 is an apocalyptic number.

102012221002 is a deficient number, since it is larger than the sum of its proper divisors (51006110504).

102012221002 is an equidigital number, since it uses as much as digits as its factorization.

102012221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51006110503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102012221002 its reverse (200122210201), we get a palindrome (302134431203).

The spelling of 102012221002 in words is "one hundred two billion, twelve million, two hundred twenty-one thousand, two".