121516505706 has 16 divisors (see below), whose sum is σ = 244041450048. Its totient is φ = 40337428800.

The previous prime is 121516505683. The next prime is 121516505713. The reversal of 121516505706 is 607505615121.

It is a happy number.

It is a super-3 number, since 3×121516505706³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42016710 + ... + 42019601.

It is an arithmetic number, because the mean of its divisors is an integer number (15252590628).

Almost surely, 2^121516505706 is an apocalyptic number.

121516505706 is an abundant number, since it is smaller than the sum of its proper divisors (122524944342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121516505706 is a wasteful number, since it uses less digits than its factorization.

121516505706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84036557.

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 121516505706 in words is "one hundred twenty-one billion, five hundred sixteen million, five hundred five thousand, seven hundred six".