20021212212202 has 16 divisors (see below), whose sum is σ = 30040433841600. Its totient is φ = 10007734674400.

The previous prime is 20021212212151. The next prime is 20021212212277. The reversal of 20021212212202 is 20221221212002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021212212202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105362577 + ... + 105552427.

It is an arithmetic number, because the mean of its divisors is an integer number (1877527115100).

Almost surely, 2^{20021212212202} is an apocalyptic number.

20021212212202 is a deficient number, since it is larger than the sum of its proper divisors (10019221629398).

20021212212202 is a wasteful number, since it uses less digits than its factorization.

20021212212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204701.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20021212212202 its reverse (20221221212002), we get a palindrome (40242433424204).

The spelling of 20021212212202 in words is "twenty trillion, twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred two".