121211000 has 64 divisors (see below), whose sum is σ = 289111680. Its totient is φ = 47548800.

The previous prime is 121210951. The next prime is 121211017. The reversal of 121211000 is 112121.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 51857 + ... + 54143.

It is an arithmetic number, because the mean of its divisors is an integer number (4517370).

Almost surely, 2^121211000 is an apocalyptic number.

121211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144555840).

121211000 is an abundant number, since it is smaller than the sum of its proper divisors (167900680).

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

121211000 is a wasteful number, since it uses less digits than its factorization.

121211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121211000 is about 11009.5867315717. The cubic root of 121211000 is about 494.8960772210.

Adding to 121211000 its reverse (112121), we get a palindrome (121323121).

The spelling of 121211000 in words is "one hundred twenty-one million, two hundred eleven thousand".