1211122101001 has 8 divisors (see below), whose sum is σ = 1293300576000. Its totient is φ = 1131638002320.

The previous prime is 1211122100989. The next prime is 1211122101017. The reversal of 1211122101001 is 1001012211121.

It is a happy number.

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

It is not a de Polignac number, because 1211122101001 - 2¹³ = 1211122092809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211122105001) 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, 673593151 + ... + 673594948.

It is an arithmetic number, because the mean of its divisors is an integer number (161662572000).

Almost surely, 2^{1211122101001} is an apocalyptic number.

It is an amenable number.

1211122101001 is a deficient number, since it is larger than the sum of its proper divisors (82178474999).

1211122101001 is a wasteful number, since it uses less digits than its factorization.

1211122101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347188159.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211122101001 its reverse (1001012211121), we get a palindrome (2212134312122).

The spelling of 1211122101001 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred one thousand, one".