201221012121022 has 8 divisors (see below), whose sum is σ = 319586313368736. Its totient is φ = 94692240998112.

The previous prime is 201221012120993. The next prime is 201221012121029. The reversal of 201221012121022 is 220121210122102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221012121029) 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, 2959132531158 + ... + 2959132531225.

It is an arithmetic number, because the mean of its divisors is an integer number (39948289171092).

Almost surely, 2^{201221012121022} is an apocalyptic number.

201221012121022 is a deficient number, since it is larger than the sum of its proper divisors (118365301247714).

201221012121022 is a wasteful number, since it uses less digits than its factorization.

201221012121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918265062402.

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

Adding to 201221012121022 its reverse (220121210122102), we get a palindrome (421342222243124).

The spelling of 201221012121022 in words is "two hundred one trillion, two hundred twenty-one billion, twelve million, one hundred twenty-one thousand, twenty-two".