1211003223121 has 8 divisors (see below), whose sum is σ = 1287988660224. Its totient is φ = 1134656669760.

The previous prime is 1211003223083. The next prime is 1211003223187. The reversal of 1211003223121 is 1213223001121.

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 1211003223121 - 2¹¹ = 1211003221073 is a prime.

It is a super-3 number, since 3×1211003223121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211003224121) 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, 159717025 + ... + 159724606.

It is an arithmetic number, because the mean of its divisors is an integer number (160998582528).

Almost surely, 2^{1211003223121} is an apocalyptic number.

It is an amenable number.

1211003223121 is a deficient number, since it is larger than the sum of its proper divisors (76985437103).

1211003223121 is a wasteful number, since it uses less digits than its factorization.

1211003223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319441871.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211003223121 its reverse (1213223001121), we get a palindrome (2424226224242).

The spelling of 1211003223121 in words is "one trillion, two hundred eleven billion, three million, two hundred twenty-three thousand, one hundred twenty-one".