121205045616 has 80 divisors (see below), whose sum is σ = 328532305920. Its totient is φ = 38431514880.

The previous prime is 121205045551. The next prime is 121205045653. The reversal of 121205045616 is 616540502121.

It is a congruent number.

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, 103456 + ... + 503103.

It is an arithmetic number, because the mean of its divisors is an integer number (4106653824).

Almost surely, 2^121205045616 is an apocalyptic number.

121205045616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121205045616 is an abundant number, since it is smaller than the sum of its proper divisors (207327260304).

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

121205045616 is a wasteful number, since it uses less digits than its factorization.

121205045616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606774 (or 606768 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 121205045616 its reverse (616540502121), we get a palindrome (737745547737).

The spelling of 121205045616 in words is "one hundred twenty-one billion, two hundred five million, forty-five thousand, six hundred sixteen".