102121522 has 4 divisors (see below), whose sum is σ = 153182286. Its totient is φ = 51060760.

The previous prime is 102121519. The next prime is 102121531. The reversal of 102121522 is 225121201.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 48846121 = 7299^2 + 6989^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102121496 and 102121505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530379 + ... + 25530382.

Almost surely, 2^102121522 is an apocalyptic number.

102121522 is a deficient number, since it is larger than the sum of its proper divisors (51060764).

102121522 is an equidigital number, since it uses as much as digits as its factorization.

102121522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060763.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 102121522 is about 10105.5193829907. The cubic root of 102121522 is about 467.4183517224.

Adding to 102121522 its reverse (225121201), we get a palindrome (327242723).

The spelling of 102121522 in words is "one hundred two million, one hundred twenty-one thousand, five hundred twenty-two".