1211022201121 has 4 divisors (see below), whose sum is σ = 1231548001200. Its totient is φ = 1190496401044.

The previous prime is 1211022201113. The next prime is 1211022201199.

1211022201121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1211022201121 - 2³ = 1211022201113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211022201095 and 1211022201104.

It is not an unprimeable number, because it can be changed into a prime (1211022201721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10262899951 + ... + 10262900068.

It is an arithmetic number, because the mean of its divisors is an integer number (307887000300).

Almost surely, 2^{1211022201121} is an apocalyptic number.

It is an amenable number.

1211022201121 is a deficient number, since it is larger than the sum of its proper divisors (20525800079).

1211022201121 is an equidigital number, since it uses as much as digits as its factorization.

1211022201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20525800078.

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

The spelling of 1211022201121 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred one thousand, one hundred twenty-one".