21000221444202 has 128 divisors (see below), whose sum is σ = 57916317247488. Its totient is φ = 4898936505600.

The previous prime is 21000221444201. The next prime is 21000221444219. The reversal of 21000221444202 is 20244412200012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21000221444201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47028324 + ... + 47472767.

It is an arithmetic number, because the mean of its divisors is an integer number (452471228496).

Almost surely, 2^{21000221444202} is an apocalyptic number.

21000221444202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000221444202 is an abundant number, since it is smaller than the sum of its proper divisors (36916095803286).

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

21000221444202 is a wasteful number, since it uses less digits than its factorization.

21000221444202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94501164.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21000221444202 its reverse (20244412200012), we get a palindrome (41244633644214).

The spelling of 21000221444202 in words is "twenty-one trillion, two hundred twenty-one million, four hundred forty-four thousand, two hundred two".