1021002102122 has 8 divisors (see below), whose sum is σ = 1535247660900. Its totient is φ = 509252881824.

The previous prime is 1021002102091. The next prime is 1021002102139. The reversal of 1021002102122 is 2212012001201.

It can be written as a sum of positive squares in 2 ways, for example, as 1005168661561 + 15833440561 = 1002581^2 + 125831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1021002102097 and 1021002102106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624083597 + ... + 624085232.

Almost surely, 2^{1021002102122} is an apocalyptic number.

1021002102122 is a deficient number, since it is larger than the sum of its proper divisors (514245558778).

1021002102122 is a wasteful number, since it uses less digits than its factorization.

1021002102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248169240.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021002102122 its reverse (2212012001201), we get a palindrome (3233014103323).

The spelling of 1021002102122 in words is "one trillion, twenty-one billion, two million, one hundred two thousand, one hundred twenty-two".