2121121020222 has 40 divisors (see below), whose sum is σ = 4782041132616. Its totient is φ = 702702660528.

The previous prime is 2121121020199. The next prime is 2121121020229. The reversal of 2121121020222 is 2220201211212.

It is a happy number.

2121121020222 is a `hidden beast` number, since 2 + 1 + 211 + 210 + 20 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2121121020195 and 2121121020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121020229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40137213 + ... + 40190024.

Almost surely, 2^{2121121020222} is an apocalyptic number.

2121121020222 is an abundant number, since it is smaller than the sum of its proper divisors (2660920112394).

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

2121121020222 is a wasteful number, since it uses less digits than its factorization.

2121121020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80327414 (or 80327405 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2121121020222 its reverse (2220201211212), we get a palindrome (4341322231434).

The spelling of 2121121020222 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty thousand, two hundred twenty-two".