221212020020002 has 48 divisors (see below), whose sum is σ = 371866267717560. Its totient is φ = 98601334318080.

The previous prime is 221212020019987. The next prime is 221212020020039. The reversal of 221212020020002 is 200020020212122.

It can be written as a sum of positive squares in 4 ways, for example, as 164752139607561 + 56459880412441 = 12835581^2 + 7513979^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40669333 + ... + 45786664.

Almost surely, 2^{221212020020002} is an apocalyptic number.

221212020020002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221212020020002 is a deficient number, since it is larger than the sum of its proper divisors (150654247697558).

221212020020002 is a wasteful number, since it uses less digits than its factorization.

221212020020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86456227 (or 86456216 counting only the distinct ones).

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

Adding to 221212020020002 its reverse (200020020212122), we get a palindrome (421232040232124).

The spelling of 221212020020002 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty million, twenty thousand, two".