220121022210121 has 32 divisors (see below), whose sum is σ = 231421184421120. Its totient is φ = 208968241557504.

The previous prime is 220121022210083. The next prime is 220121022210139. The reversal of 220121022210121 is 121012220121022.

It is a cyclic number.

It is not a de Polignac number, because 220121022210121 - 2⁷ = 220121022209993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121022210181) 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, 12500475165 + ... + 12500492773.

It is an arithmetic number, because the mean of its divisors is an integer number (7231912013160).

Almost surely, 2^{220121022210121} is an apocalyptic number.

It is an amenable number.

220121022210121 is a deficient number, since it is larger than the sum of its proper divisors (11300162210999).

220121022210121 is a wasteful number, since it uses less digits than its factorization.

220121022210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21585.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220121022210121 its reverse (121012220121022), we get a palindrome (341133242331143).

The spelling of 220121022210121 in words is "two hundred twenty trillion, one hundred twenty-one billion, twenty-two million, two hundred ten thousand, one hundred twenty-one".