220400235129 has 16 divisors (see below), whose sum is σ = 295929906048. Its totient is φ = 145903832832.

The previous prime is 220400235071. The next prime is 220400235151. The reversal of 220400235129 is 921532004022.

It is not a de Polignac number, because 220400235129 - 2²⁴ = 220383457913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220400235096 and 220400235105.

It is not an unprimeable number, because it can be changed into a prime (220400235179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264339 + ... + 714615.

It is an arithmetic number, because the mean of its divisors is an integer number (18495619128).

Almost surely, 2^220400235129 is an apocalyptic number.

It is an amenable number.

220400235129 is a deficient number, since it is larger than the sum of its proper divisors (75529670919).

220400235129 is a wasteful number, since it uses less digits than its factorization.

220400235129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451424.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 220400235129 in words is "two hundred twenty billion, four hundred million, two hundred thirty-five thousand, one hundred twenty-nine".