20021211210002 has 16 divisors (see below), whose sum is σ = 30219872159232. Its totient is φ = 9948083521680.

The previous prime is 20021211209983. The next prime is 20021211210031. The reversal of 20021211210002 is 20001211212002.

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 in 7 ways as a sum of consecutive naturals, for example, 40511858 + ... + 41003085.

It is an arithmetic number, because the mean of its divisors is an integer number (1888742009952).

Almost surely, 2^{20021211210002} is an apocalyptic number.

20021211210002 is a deficient number, since it is larger than the sum of its proper divisors (10198660949230).

20021211210002 is a wasteful number, since it uses less digits than its factorization.

20021211210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81515713.

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

Adding to 20021211210002 its reverse (20001211212002), we get a palindrome (40022422422004).

It can be divided in two parts, 2002121 and 1210002, that added together give a palindrome (3212123).

The spelling of 20021211210002 in words is "twenty trillion, twenty-one billion, two hundred eleven million, two hundred ten thousand, two".