121545102 has 64 divisors (see below), whose sum is σ = 288276480. Its totient is φ = 33444576.

The previous prime is 121545101. The next prime is 121545139. The reversal of 121545102 is 201545121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131799 + ... + 132717.

It is an arithmetic number, because the mean of its divisors is an integer number (4504320).

Almost surely, 2^121545102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121545102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144138240).

121545102 is an abundant number, since it is smaller than the sum of its proper divisors (166731378).

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

121545102 is a wasteful number, since it uses less digits than its factorization.

121545102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121545102 is about 11024.7495209642. The cubic root of 121545102 is about 495.3503651528.

The spelling of 121545102 in words is "one hundred twenty-one million, five hundred forty-five thousand, one hundred two".