2121121221150 has 24 divisors (see below), whose sum is σ = 5260380628824. Its totient is φ = 565632325600.

The previous prime is 2121121221103. The next prime is 2121121221151. The reversal of 2121121221150 is 511221211212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121221151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7070403921 + ... + 7070404220.

It is an arithmetic number, because the mean of its divisors is an integer number (219182526201).

Almost surely, 2^{2121121221150} is an apocalyptic number.

2121121221150 is an abundant number, since it is smaller than the sum of its proper divisors (3139259407674).

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

2121121221150 is a wasteful number, since it uses less digits than its factorization.

2121121221150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140808156 (or 14140808151 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 21.

Adding to 2121121221150 its reverse (511221211212), we get a palindrome (2632342432362).

The spelling of 2121121221150 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred fifty".