102121202 has 4 divisors (see below), whose sum is σ = 153181806. Its totient is φ = 51060600.

The previous prime is 102121189. The next prime is 102121207. The reversal of 102121202 is 202121201.

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: 202121201 = 151 ⋅1338551.

It can be written as a sum of positive squares in only one way, i.e., 96452041 + 5669161 = 9821^2 + 2381^2 .

It is not an unprimeable number, because it can be changed into a prime (102121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530299 + ... + 25530302.

Almost surely, 2^102121202 is an apocalyptic number.

102121202 is a deficient number, since it is larger than the sum of its proper divisors (51060604).

102121202 is an equidigital number, since it uses as much as digits as its factorization.

102121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060603.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 102121202 is about 10105.5035500464. The cubic root of 102121202 is about 467.4178635000.

Adding to 102121202 its reverse (202121201), we get a palindrome (304242403).

Subtracting 102121202 from its reverse (202121201), we obtain a palindrome (99999999).

It can be divided in two parts, 10 and 2121202, that added together give a palindrome (2121212).

The spelling of 102121202 in words is "one hundred two million, one hundred twenty-one thousand, two hundred two".