1211001101222 has 8 divisors (see below), whose sum is σ = 1981638165672. Its totient is φ = 550455046000.

The previous prime is 1211001101153. The next prime is 1211001101237. The reversal of 1211001101222 is 2221011001121.

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

It is a junction number, because it is equal to n+sod(n) for n = 1211001101197 and 1211001101206.

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, 27522752279 + ... + 27522752322.

It is an arithmetic number, because the mean of its divisors is an integer number (247704770709).

Almost surely, 2^{1211001101222} is an apocalyptic number.

1211001101222 is a deficient number, since it is larger than the sum of its proper divisors (770637064450).

1211001101222 is a wasteful number, since it uses less digits than its factorization.

1211001101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55045504614.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211001101222 its reverse (2221011001121), we get a palindrome (3432012102343).

The spelling of 1211001101222 in words is "one trillion, two hundred eleven billion, one million, one hundred one thousand, two hundred twenty-two".