2131021100122 has 4 divisors (see below), whose sum is σ = 3196531650186. Its totient is φ = 1065510550060.

The previous prime is 2131021100099. The next prime is 2131021100183. The reversal of 2131021100122 is 2210011201312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1582264610161 + 548756489961 = 1257881^2 + 740781^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2131021100096 and 2131021100105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532755275029 + ... + 532755275032.

Almost surely, 2^{2131021100122} is an apocalyptic number.

2131021100122 is a deficient number, since it is larger than the sum of its proper divisors (1065510550064).

2131021100122 is a wasteful number, since it uses less digits than its factorization.

2131021100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065510550063.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2131021100122 its reverse (2210011201312), we get a palindrome (4341032301434).

The spelling of 2131021100122 in words is "two trillion, one hundred thirty-one billion, twenty-one million, one hundred thousand, one hundred twenty-two".