1210011221121 has 8 divisors (see below), whose sum is σ = 1683493872960. Its totient is φ = 771601358352.

The previous prime is 1210011221119. The next prime is 1210011221137. The reversal of 1210011221121 is 1211221100121.

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 1210011221121 - 2¹ = 1210011221119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210011221121.

It is not an unprimeable number, because it can be changed into a prime (1210011221141) 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, 8768197186 + ... + 8768197323.

It is an arithmetic number, because the mean of its divisors is an integer number (210436734120).

Almost surely, 2^{1210011221121} is an apocalyptic number.

It is an amenable number.

1210011221121 is a deficient number, since it is larger than the sum of its proper divisors (473482651839).

1210011221121 is a wasteful number, since it uses less digits than its factorization.

1210011221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17536394535.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1210011221121 its reverse (1211221100121), we get a palindrome (2421232321242).

The spelling of 1210011221121 in words is "one trillion, two hundred ten billion, eleven million, two hundred twenty-one thousand, one hundred twenty-one".