121212011 has 8 divisors (see below), whose sum is σ = 121967040. Its totient is φ = 120460032.

The previous prime is 121211999. The next prime is 121212017. The reversal of 121212011 is 110212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212011 is a prime.

It is a super-2 number, since 2×121212011² = 29384703221328242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211983 and 121212001.

It is not an unprimeable number, because it can be changed into a prime (121212017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179771 + ... + 180443.

It is an arithmetic number, because the mean of its divisors is an integer number (15245880).

Almost surely, 2^121212011 is an apocalyptic number.

121212011 is a deficient number, since it is larger than the sum of its proper divisors (755029).

121212011 is an equidigital number, since it uses as much as digits as its factorization.

121212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121212011 is about 11009.6326460060. The cubic root of 121212011 is about 494.8974531647.

Adding to 121212011 its reverse (110212121), we get a palindrome (231424132).

The spelling of 121212011 in words is "one hundred twenty-one million, two hundred twelve thousand, eleven".