20021210120002 has 48 divisors (see below), whose sum is σ = 38835895779072. Its totient is φ = 7664979399840.

The previous prime is 20021210119961. The next prime is 20021210120003. The reversal of 20021210120002 is 20002101212002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20021210120003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253432048 + ... + 253511035.

It is an arithmetic number, because the mean of its divisors is an integer number (809081162064).

Almost surely, 2^{20021210120002} is an apocalyptic number.

20021210120002 is a deficient number, since it is larger than the sum of its proper divisors (18814685659070).

20021210120002 is a wasteful number, since it uses less digits than its factorization.

20021210120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506943143 (or 506943136 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021210120002 its reverse (20002101212002), we get a palindrome (40023311332004).

The spelling of 20021210120002 in words is "twenty trillion, twenty-one billion, two hundred ten million, one hundred twenty thousand, two".