21031022120002 has 16 divisors (see below), whose sum is σ = 31626425012472. Its totient is φ = 10488882476800.

The previous prime is 21031022119957. The next prime is 21031022120023. The reversal of 21031022120002 is 20002122013012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14305044404401 + 6725977715601 = 3782201^2 + 2593449^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20818128 + ... + 21804964.

Almost surely, 2^{21031022120002} is an apocalyptic number.

21031022120002 is a deficient number, since it is larger than the sum of its proper divisors (10595402892470).

21031022120002 is a wasteful number, since it uses less digits than its factorization.

21031022120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013813.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21031022120002 its reverse (20002122013012), we get a palindrome (41033144133014).

The spelling of 21031022120002 in words is "twenty-one trillion, thirty-one billion, twenty-two million, one hundred twenty thousand, two".