220120112121 has 64 divisors (see below), whose sum is σ = 381459886080. Its totient is φ = 109641911040.

The previous prime is 220120112119. The next prime is 220120112123. The reversal of 220120112121 is 121211021022.

It is an interprime number because it is at equal distance from previous prime (220120112119) and next prime (220120112123).

It is not a de Polignac number, because 220120112121 - 2¹ = 220120112119 is a prime.

It is a super-2 number, since 2×220120112121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220120112121.

It is not an unprimeable number, because it can be changed into a prime (220120112123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1544931 + ... + 1681383.

It is an arithmetic number, because the mean of its divisors is an integer number (5960310720).

Almost surely, 2^220120112121 is an apocalyptic number.

220120112121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220120112121 is a deficient number, since it is larger than the sum of its proper divisors (161339773959).

220120112121 is a wasteful number, since it uses less digits than its factorization.

220120112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136806.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220120112121 its reverse (121211021022), we get a palindrome (341331133143).

The spelling of 220120112121 in words is "two hundred twenty billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty-one".