20021212020210 has 64 divisors (see below), whose sum is σ = 51352923065472. Its totient is φ = 4977969652736.

The previous prime is 20021212020143. The next prime is 20021212020217. The reversal of 20021212020210 is 1202021212002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021212020210.

It is not an unprimeable number, because it can be changed into a prime (20021212020217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183390657 + ... + 183499796.

It is an arithmetic number, because the mean of its divisors is an integer number (802389422898).

Almost surely, 2^{20021212020210} is an apocalyptic number.

20021212020210 is an abundant number, since it is smaller than the sum of its proper divisors (31331711045262).

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

20021212020210 is a wasteful number, since it uses less digits than its factorization.

20021212020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366890587.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021212020210 its reverse (1202021212002), we get a palindrome (21223233232212).

The spelling of 20021212020210 in words is "twenty trillion, twenty-one billion, two hundred twelve million, twenty thousand, two hundred ten".