121012101 has 24 divisors (see below), whose sum is σ = 200054400. Its totient is φ = 69050016.

The previous prime is 121012081. The next prime is 121012109. The reversal of 121012101 is 101210121.

It is a happy number.

121012101 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 121012101 - 2⁶ = 121012037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85800 + ... + 87198.

It is an arithmetic number, because the mean of its divisors is an integer number (8335600).

Almost surely, 2^121012101 is an apocalyptic number.

It is an amenable number.

121012101 is a deficient number, since it is larger than the sum of its proper divisors (79042299).

121012101 is a wasteful number, since it uses less digits than its factorization.

121012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2782 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 121012101 is about 11000.5500317030. The cubic root of 121012101 is about 494.6252320959.

Adding to 121012101 its reverse (101210121), we get a palindrome (222222222).

The spelling of 121012101 in words is "one hundred twenty-one million, twelve thousand, one hundred one".