220001210121 has 32 divisors (see below), whose sum is σ = 384964531200. Its totient is φ = 108271270080.

The previous prime is 220001210063. The next prime is 220001210123. The reversal of 220001210121 is 121012100022.

It is not a de Polignac number, because 220001210121 - 2¹⁵ = 220001177353 is a prime.

220001210121 is a modest number, since divided by 1210121 gives 2200 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 220001210097 and 220001210106.

It is not an unprimeable number, because it can be changed into a prime (220001210123) 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, 25058406 + ... + 25067183.

It is an arithmetic number, because the mean of its divisors is an integer number (12030141600).

Almost surely, 2^220001210121 is an apocalyptic number.

220001210121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220001210121 is a deficient number, since it is larger than the sum of its proper divisors (164963321079).

220001210121 is a wasteful number, since it uses less digits than its factorization.

220001210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50125629.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 220001210121 its reverse (121012100022), we get a palindrome (341013310143).

The spelling of 220001210121 in words is "two hundred twenty billion, one million, two hundred ten thousand, one hundred twenty-one".