121516061 has 18 divisors (see below), whose sum is σ = 132902490. Its totient is φ = 110963776.

The previous prime is 121516049. The next prime is 121516093. The reversal of 121516061 is 160615121.

It can be written as a sum of positive squares in 3 ways, for example, as 648025 + 120868036 = 805^2 + 10994^2 .

It is not a de Polignac number, because 121516061 - 2⁶ = 121515997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121516261) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1365305 + ... + 1365393.

Almost surely, 2^121516061 is an apocalyptic number.

It is an amenable number.

121516061 is a deficient number, since it is larger than the sum of its proper divisors (11386429).

121516061 is an frugal number, since it uses more digits than its factorization.

121516061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 121516061 is about 11023.4323602043. The cubic root of 121516061 is about 495.3109103453.

The spelling of 121516061 in words is "one hundred twenty-one million, five hundred sixteen thousand, sixty-one".