121001010 has 64 divisors (see below), whose sum is σ = 313891200. Its totient is φ = 29675520.

The previous prime is 121000993. The next prime is 121001033. The reversal of 121001010 is 10100121.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a self number, because there is not a number n which added to its sum of digits gives 121001010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174765 + ... + 175455.

It is an arithmetic number, because the mean of its divisors is an integer number (4904550).

Almost surely, 2^121001010 is an apocalyptic number.

121001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156945600).

121001010 is an abundant number, since it is smaller than the sum of its proper divisors (192890190).

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

121001010 is a wasteful number, since it uses less digits than its factorization.

121001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 121001010 is about 11000.0459089951. The cubic root of 121001010 is about 494.6101205052.

Adding to 121001010 its reverse (10100121), we get a palindrome (131101131).

The spelling of 121001010 in words is "one hundred twenty-one million, one thousand, ten".