20021212222002 has 24 divisors (see below), whose sum is σ = 44302256833536. Its totient is φ = 6531742994136.

The previous prime is 20021212222001. The next prime is 20021212222009. The reversal of 20021212222002 is 20022221212002.

20021212222002 is a `hidden beast` number, since 200 + 21 + 21 + 222 + 200 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20021212222001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11832866898 + ... + 11832868589.

It is an arithmetic number, because the mean of its divisors is an integer number (1845927368064).

Almost surely, 2^{20021212222002} is an apocalyptic number.

20021212222002 is an abundant number, since it is smaller than the sum of its proper divisors (24281044611534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021212222002 is a wasteful number, since it uses less digits than its factorization.

20021212222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23665735542 (or 23665735539 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20021212222002 its reverse (20022221212002), we get a palindrome (40043433434004).

The spelling of 20021212222002 in words is "twenty trillion, twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, two".