210121022221012 has 12 divisors (see below), whose sum is σ = 420242044442080. Its totient is φ = 90051866666136.

The previous prime is 210121022220983. The next prime is 210121022221043. The reversal of 210121022221012 is 210122220121012.

210121022221012 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3752161111062 + ... + 3752161111117.

Almost surely, 2^{210121022221012} is an apocalyptic number.

It is an amenable number.

210121022221012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

210121022221012 is a wasteful number, since it uses less digits than its factorization.

210121022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7504322222190 (or 7504322222188 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210121022221012 its reverse (210122220121012), we get a palindrome (420243242342024).

The spelling of 210121022221012 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, twelve".