201211222222101 has 32 divisors (see below), whose sum is σ = 347571342039040. Its totient is φ = 100547423941824.

The previous prime is 201211222222097. The next prime is 201211222222117. The reversal of 201211222222101 is 101222222112102.

It is not a de Polignac number, because 201211222222101 - 2² = 201211222222097 is a prime.

It is a super-2 number, since 2×201211222222101² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211222222151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19395717025 + ... + 19395727398.

It is an arithmetic number, because the mean of its divisors is an integer number (10861604438720).

Almost surely, 2^{201211222222101} is an apocalyptic number.

201211222222101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201211222222101 is a deficient number, since it is larger than the sum of its proper divisors (146360119816939).

201211222222101 is a wasteful number, since it uses less digits than its factorization.

201211222222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38791444465.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201211222222101 its reverse (101222222112102), we get a palindrome (302433444334203).

The spelling of 201211222222101 in words is "two hundred one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred one".