2121100031022 has 128 divisors (see below), whose sum is σ = 5159037312000. Its totient is φ = 567905126400.

The previous prime is 2121100030981. The next prime is 2121100031053. The reversal of 2121100031022 is 2201300011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121100030992 and 2121100031010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28618372 + ... + 28692392.

It is an arithmetic number, because the mean of its divisors is an integer number (40304979000).

Almost surely, 2^{2121100031022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121100031022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2579518656000).

2121100031022 is an abundant number, since it is smaller than the sum of its proper divisors (3037937280978).

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

2121100031022 is a wasteful number, since it uses less digits than its factorization.

2121100031022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74442.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2121100031022 its reverse (2201300011212), we get a palindrome (4322400042234).

The spelling of 2121100031022 in words is "two trillion, one hundred twenty-one billion, one hundred million, thirty-one thousand, twenty-two".