20021220212102 has 8 divisors (see below), whose sum is σ = 31798408572216. Its totient is φ = 9421750688032.

The previous prime is 20021220212101. The next prime is 20021220212113. The reversal of 20021220212102 is 20121202212002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021220212101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294429708968 + ... + 294429709035.

It is an arithmetic number, because the mean of its divisors is an integer number (3974801071527).

Almost surely, 2^{20021220212102} is an apocalyptic number.

20021220212102 is a deficient number, since it is larger than the sum of its proper divisors (11777188360114).

20021220212102 is a wasteful number, since it uses less digits than its factorization.

20021220212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588859418022.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20021220212102 its reverse (20121202212002), we get a palindrome (40142422424104).

The spelling of 20021220212102 in words is "twenty trillion, twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred two".