121001220212 has 12 divisors (see below), whose sum is σ = 224208143460. Its totient is φ = 56941750656.

The previous prime is 121001220203. The next prime is 121001220217. The reversal of 121001220212 is 212022100121.

It can be written as a sum of positive squares in 2 ways, for example, as 55509244816 + 65491975396 = 235604^2 + 255914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001220217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889714787 + ... + 889714922.

It is an arithmetic number, because the mean of its divisors is an integer number (18684011955).

Almost surely, 2^121001220212 is an apocalyptic number.

It is an amenable number.

121001220212 is a deficient number, since it is larger than the sum of its proper divisors (103206923248).

121001220212 is a wasteful number, since it uses less digits than its factorization.

121001220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779429730 (or 1779429728 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121001220212 its reverse (212022100121), we get a palindrome (333023320333).

The spelling of 121001220212 in words is "one hundred twenty-one billion, one million, two hundred twenty thousand, two hundred twelve".