11221312121000 has 64 divisors (see below), whose sum is σ = 26868518614080. Its totient is φ = 4384140532800.

The previous prime is 11221312120973. The next prime is 11221312121009. The reversal of 11221312121000 is 12121312211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221312121000.

It is not an unprimeable number, because it can be changed into a prime (11221312121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130437374 + ... + 130523373.

It is an arithmetic number, because the mean of its divisors is an integer number (419820603345).

Almost surely, 2^{11221312121000} is an apocalyptic number.

11221312121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221312121000 is an abundant number, since it is smaller than the sum of its proper divisors (15647206493080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221312121000 is a wasteful number, since it uses less digits than its factorization.

11221312121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260960811 (or 260960797 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11221312121000 its reverse (12121312211), we get a palindrome (11233433433211).

The spelling of 11221312121000 in words is "eleven trillion, two hundred twenty-one billion, three hundred twelve million, one hundred twenty-one thousand".