21012020220202 has 16 divisors (see below), whose sum is σ = 34383791836800. Its totient is φ = 9550783275840.

The previous prime is 21012020220101. The next prime is 21012020220203. The reversal of 21012020220202 is 20202202021012.

It is not an unprimeable number, because it can be changed into a prime (21012020220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5150127 + ... + 8279362.

It is an arithmetic number, because the mean of its divisors is an integer number (2148986989800).

Almost surely, 2^{21012020220202} is an apocalyptic number.

21012020220202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012020220202 is a deficient number, since it is larger than the sum of its proper divisors (13371771616598).

21012020220202 is a wasteful number, since it uses less digits than its factorization.

21012020220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500621.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21012020220202 its reverse (20202202021012), we get a palindrome (41214222241214).

The spelling of 21012020220202 in words is "twenty-one trillion, twelve billion, twenty million, two hundred twenty thousand, two hundred two".