121551000502 has 8 divisors (see below), whose sum is σ = 182781181512. Its totient is φ = 60623940000.

The previous prime is 121551000457. The next prime is 121551000511. The reversal of 121551000502 is 205000155121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75779124 + ... + 75780727.

It is an arithmetic number, because the mean of its divisors is an integer number (22847647689).

Almost surely, 2^121551000502 is an apocalyptic number.

121551000502 is a deficient number, since it is larger than the sum of its proper divisors (61230181010).

121551000502 is a wasteful number, since it uses less digits than its factorization.

121551000502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151560254.

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 121551000502 its reverse (205000155121), we get a palindrome (326551155623).

The spelling of 121551000502 in words is "one hundred twenty-one billion, five hundred fifty-one million, five hundred two", and thus it is an aban number.