220354434121 has 4 divisors (see below), whose sum is σ = 221398768144. Its totient is φ = 219310100100.

The previous prime is 220354434107. The next prime is 220354434137. The reversal of 220354434121 is 121434453022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121434453022 = 2 ⋅60717226511.

It is a cyclic number.

It is not a de Polignac number, because 220354434121 - 2³⁷ = 82915480649 is a prime.

It is a super-2 number, since 2×220354434121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220354414121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522166695 + ... + 522167116.

It is an arithmetic number, because the mean of its divisors is an integer number (55349692036).

Almost surely, 2^220354434121 is an apocalyptic number.

It is an amenable number.

220354434121 is a deficient number, since it is larger than the sum of its proper divisors (1044334023).

220354434121 is a wasteful number, since it uses less digits than its factorization.

220354434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044334022.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 220354434121 its reverse (121434453022), we get a palindrome (341788887143).

The spelling of 220354434121 in words is "two hundred twenty billion, three hundred fifty-four million, four hundred thirty-four thousand, one hundred twenty-one".