121217061516 has 48 divisors (see below), whose sum is σ = 289670349024. Its totient is φ = 39441309696.

The previous prime is 121217061499. The next prime is 121217061527. The reversal of 121217061516 is 615160712121.

It is a super-3 number, since 3×121217061516³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628305 + ... + 798248.

It is an arithmetic number, because the mean of its divisors is an integer number (6034798938).

Almost surely, 2^121217061516 is an apocalyptic number.

It is an amenable number.

121217061516 is an abundant number, since it is smaller than the sum of its proper divisors (168453287508).

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

121217061516 is a wasteful number, since it uses less digits than its factorization.

121217061516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426730 (or 1426728 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

Adding to 121217061516 its reverse (615160712121), we get a palindrome (736377773637).

The spelling of 121217061516 in words is "one hundred twenty-one billion, two hundred seventeen million, sixty-one thousand, five hundred sixteen".