2121220021122 has 32 divisors (see below), whose sum is σ = 4755537524160. Its totient is φ = 700816052160.

The previous prime is 2121220021121. The next prime is 2121220021229. The reversal of 2121220021122 is 2211200221212.

It is a happy number.

2121220021122 is a `hidden beast` number, since 21 + 212 + 200 + 211 + 22 = 666.

It is a super-2 number, since 2×2121220021122² (a number of 25 digits) contains 22 as substring.

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 = 2121220021095 and 2121220021104.

It is not an unprimeable number, because it can be changed into a prime (2121220021121) 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, 173807404 + ... + 173819607.

It is an arithmetic number, because the mean of its divisors is an integer number (148610547630).

Almost surely, 2^{2121220021122} is an apocalyptic number.

2121220021122 is an abundant number, since it is smaller than the sum of its proper divisors (2634317503038).

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

2121220021122 is a wasteful number, since it uses less digits than its factorization.

2121220021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347627135 (or 347627129 counting only the distinct ones).

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

Adding to 2121220021122 its reverse (2211200221212), we get a palindrome (4332420242334).

The spelling of 2121220021122 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, one hundred twenty-two".