20021220102002 has 32 divisors (see below), whose sum is σ = 36253192065024. Its totient is φ = 8110621789200.

The previous prime is 20021220101989. The next prime is 20021220102041. The reversal of 20021220102002 is 20020102212002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536398124 + ... + 536435447.

It is an arithmetic number, because the mean of its divisors is an integer number (1132912252032).

Almost surely, 2^{20021220102002} is an apocalyptic number.

20021220102002 is a deficient number, since it is larger than the sum of its proper divisors (16231971963022).

20021220102002 is a wasteful number, since it uses less digits than its factorization.

20021220102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072833654.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021220102002 its reverse (20020102212002), we get a palindrome (40041322314004).

The spelling of 20021220102002 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred two thousand, two".