20021211210022 has 64 divisors (see below), whose sum is σ = 34671215738880. Its totient is φ = 8581453434400.

The previous prime is 20021211209983. The next prime is 20021211210031. The reversal of 20021211210022 is 22001211212002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021211209978 and 20021211210005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518141379 + ... + 518180017.

It is an arithmetic number, because the mean of its divisors is an integer number (541737745920).

Almost surely, 2^{20021211210022} is an apocalyptic number.

20021211210022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021211210022 is a deficient number, since it is larger than the sum of its proper divisors (14650004528858).

20021211210022 is a wasteful number, since it uses less digits than its factorization.

20021211210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53169.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021211210022 its reverse (22001211212002), we get a palindrome (42022422422024).

The spelling of 20021211210022 in words is "twenty trillion, twenty-one billion, two hundred eleven million, two hundred ten thousand, twenty-two".