1121211220201 has 4 divisors (see below), whose sum is σ = 1159873676100. Its totient is φ = 1082548764304.

The previous prime is 1121211220159. The next prime is 1121211220253. The reversal of 1121211220201 is 1020221121211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 909658137600 + 211553082601 = 953760^2 + 459949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121211220201 - 2²¹ = 1121209123049 is a prime.

It is a super-2 number, since 2×1121211220201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121211220601) 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, 19331227906 + ... + 19331227963.

It is an arithmetic number, because the mean of its divisors is an integer number (289968419025).

Almost surely, 2^{1121211220201} is an apocalyptic number.

It is an amenable number.

1121211220201 is a deficient number, since it is larger than the sum of its proper divisors (38662455899).

1121211220201 is an equidigital number, since it uses as much as digits as its factorization.

1121211220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662455898.

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

Adding to 1121211220201 its reverse (1020221121211), we get a palindrome (2141432341412).

The spelling of 1121211220201 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred one".