121554106 has 16 divisors (see below), whose sum is σ = 184903560. Its totient is φ = 59924800.

The previous prime is 121554073. The next prime is 121554107. The reversal of 121554106 is 601455121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 116532025 + 5022081 = 10795^2 + 2241^2 .

It is a super-3 number, since 3×121554106³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121554107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53220 + ... + 55456.

Almost surely, 2^121554106 is an apocalyptic number.

121554106 is a deficient number, since it is larger than the sum of its proper divisors (63349454).

121554106 is a wasteful number, since it uses less digits than its factorization.

121554106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121554106 is about 11025.1578673505. The cubic root of 121554106 is about 495.3625966194.

It can be divided in two parts, 12155 and 4106, that added together give a palindrome (16261).

The spelling of 121554106 in words is "one hundred twenty-one million, five hundred fifty-four thousand, one hundred six".