201022112001221 has 16 divisors (see below), whose sum is σ = 241871105064960. Its totient is φ = 163209005526960.

The previous prime is 201022112001199. The next prime is 201022112001299. The reversal of 201022112001221 is 122100211220102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201022112001221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201022112001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022112009221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124170485 + ... + 125778986.

It is an arithmetic number, because the mean of its divisors is an integer number (15116944066560).

Almost surely, 2^{201022112001221} is an apocalyptic number.

It is an amenable number.

201022112001221 is a deficient number, since it is larger than the sum of its proper divisors (40848993063739).

201022112001221 is a wasteful number, since it uses less digits than its factorization.

201022112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249955544.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201022112001221 its reverse (122100211220102), we get a palindrome (323122323221323).

The spelling of 201022112001221 in words is "two hundred one trillion, twenty-two billion, one hundred twelve million, one thousand, two hundred twenty-one".