121711212 has 72 divisors (see below), whose sum is σ = 354471936. Its totient is φ = 34491744.

The previous prime is 121711201. The next prime is 121711273. The reversal of 121711212 is 212117121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30103 + ... + 33905.

Almost surely, 2^121711212 is an apocalyptic number.

121711212 is a gapful number since it is divisible by the number (12) 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 121711212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177235968).

121711212 is an abundant number, since it is smaller than the sum of its proper divisors (232760724).

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

121711212 is a wasteful number, since it uses less digits than its factorization.

121711212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947 (or 3942 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 121711212 is about 11032.2804532880. The cubic root of 121711212 is about 495.5759198160.

Adding to 121711212 its reverse (212117121), we get a palindrome (333828333).

The spelling of 121711212 in words is "one hundred twenty-one million, seven hundred eleven thousand, two hundred twelve".