2102021221122 has 12 divisors (see below), whose sum is σ = 4554379312470. Its totient is φ = 700673740368.

The previous prime is 2102021221081. The next prime is 2102021221147. The reversal of 2102021221122 is 2211221202012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1753211679921 + 348809541201 = 1324089^2 + 590601^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 116778956729 = 2102021221122 / (2 + 1 + 0 + 2 + 0 + 2 + 1 + 2 + 2 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 2102021221095 and 2102021221104.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58389478347 + ... + 58389478382.

Almost surely, 2^{2102021221122} is an apocalyptic number.

2102021221122 is an abundant number, since it is smaller than the sum of its proper divisors (2452358091348).

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

2102021221122 is a wasteful number, since it uses less digits than its factorization.

2102021221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116778956737 (or 116778956734 counting only the distinct ones).

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

Adding to 2102021221122 its reverse (2211221202012), we get a palindrome (4313242423134).

The spelling of 2102021221122 in words is "two trillion, one hundred two billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".