1211222201101 has 8 divisors (see below), whose sum is σ = 1321353021600. Its totient is φ = 1101094665840.

The previous prime is 1211222201099. The next prime is 1211222201143. The reversal of 1211222201101 is 1011022221121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211222201101 - 2¹ = 1211222201099 is a prime.

It is a super-2 number, since 2×1211222201101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211222201201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16086 + ... + 1556503.

It is an arithmetic number, because the mean of its divisors is an integer number (165169127700).

Almost surely, 2^{1211222201101} is an apocalyptic number.

1211222201101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211222201101 is a deficient number, since it is larger than the sum of its proper divisors (110130820499).

1211222201101 is a wasteful number, since it uses less digits than its factorization.

1211222201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642619.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211222201101 its reverse (1011022221121), we get a palindrome (2222244422222).

The spelling of 1211222201101 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred one thousand, one hundred one".