220102122121 has 32 divisors (see below), whose sum is σ = 264666954240. Its totient is φ = 179065990656.

The previous prime is 220102122113. The next prime is 220102122131. The reversal of 220102122121 is 121221201022.

It is a happy number.

It is not a de Polignac number, because 220102122121 - 2³ = 220102122113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220102122095 and 220102122104.

It is not an unprimeable number, because it can be changed into a prime (220102122131) 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, 2826115 + ... + 2902951.

It is an arithmetic number, because the mean of its divisors is an integer number (8270842320).

Almost surely, 2^220102122121 is an apocalyptic number.

It is an amenable number.

220102122121 is a deficient number, since it is larger than the sum of its proper divisors (44564832119).

220102122121 is a wasteful number, since it uses less digits than its factorization.

220102122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77113.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220102122121 its reverse (121221201022), we get a palindrome (341323323143).

The spelling of 220102122121 in words is "two hundred twenty billion, one hundred two million, one hundred twenty-two thousand, one hundred twenty-one".