121551000519 has 16 divisors (see below), whose sum is σ = 180553212000. Its totient is φ = 72221283456.

The previous prime is 121551000517. The next prime is 121551000559. The reversal of 121551000519 is 915000155121.

It is not a de Polignac number, because 121551000519 - 2¹ = 121551000517 is a prime.

It is a super-2 number, since 2×121551000519² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121551000511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53734944 + ... + 53737205.

It is an arithmetic number, because the mean of its divisors is an integer number (11284575750).

Almost surely, 2^121551000519 is an apocalyptic number.

121551000519 is a deficient number, since it is larger than the sum of its proper divisors (59002211481).

121551000519 is a wasteful number, since it uses less digits than its factorization.

121551000519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107472194.

The product of its (nonzero) digits is 2250, while the sum is 30.

The spelling of 121551000519 in words is "one hundred twenty-one billion, five hundred fifty-one million, five hundred nineteen", and thus it is an aban number.