220212122212121 has 32 divisors (see below), whose sum is σ = 239220791341056. Its totient is φ = 201507658560000.

The previous prime is 220212122212111. The next prime is 220212122212337. The reversal of 220212122212121 is 121212221212022.

It is a de Polignac number, because none of the positive numbers 2^k-220212122212121 is a prime.

It is a super-2 number, since 2×220212122212121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220212122212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836855471 + ... + 837118571.

It is an arithmetic number, because the mean of its divisors is an integer number (7475649729408).

Almost surely, 2^{220212122212121} is an apocalyptic number.

It is an amenable number.

220212122212121 is a deficient number, since it is larger than the sum of its proper divisors (19008669128935).

220212122212121 is a wasteful number, since it uses less digits than its factorization.

220212122212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264473.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 220212122212121 its reverse (121212221212022), we get a palindrome (341424343424143).

The spelling of 220212122212121 in words is "two hundred twenty trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".