121211010 has 48 divisors (see below), whose sum is σ = 326022840. Its totient is φ = 31207680.

The previous prime is 121210951. The next prime is 121211017. The reversal of 121211010 is 10112121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76895361 + 44315649 = 8769^2 + 6657^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121210983 and 121211001.

It is not an unprimeable number, because it can be changed into a prime (121211017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20611 + ... + 25830.

Almost surely, 2^121211010 is an apocalyptic number.

121211010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211010 is an abundant number, since it is smaller than the sum of its proper divisors (204811830).

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

121211010 is a wasteful number, since it uses less digits than its factorization.

121211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46483 (or 46480 counting only the distinct ones).

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

The square root of 121211010 is about 11009.5871857214. The cubic root of 121211010 is about 494.8960908307.

Adding to 121211010 its reverse (10112121), we get a palindrome (131323131).

It can be divided in two parts, 12121 and 1010, that added together give a palindrome (13131).

The spelling of 121211010 in words is "one hundred twenty-one million, two hundred eleven thousand, ten".