121522516 has 18 divisors (see below), whose sum is σ = 215655342. Its totient is φ = 59918400.

The previous prime is 121522459. The next prime is 121522517. The reversal of 121522516 is 615225121.

It can be written as a sum of positive squares in 3 ways, for example, as 44890000 + 76632516 = 6700^2 + 8754^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121522517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18466 + ... + 24166.

Almost surely, 2^121522516 is an apocalyptic number.

It is an amenable number.

121522516 is a deficient number, since it is larger than the sum of its proper divisors (94132826).

121522516 is an equidigital number, since it uses as much as digits as its factorization.

121522516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851 (or 5776 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 121522516 is about 11023.7251417114. The cubic root of 121522516 is about 495.3196805860.

Adding to 121522516 its reverse (615225121), we get a palindrome (736747637).

The spelling of 121522516 in words is "one hundred twenty-one million, five hundred twenty-two thousand, five hundred sixteen".