2120220122121 has 24 divisors (see below), whose sum is σ = 3247945317864. Its totient is φ = 1328178001920.

The previous prime is 2120220122113. The next prime is 2120220122131. The reversal of 2120220122121 is 1212210220212.

It is a happy number.

2120220122121 is a `hidden beast` number, since 21 + 202 + 201 + 221 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 710750163600 + 1409469958521 = 843060^2 + 1187211^2 .

It is not a de Polignac number, because 2120220122121 - 2³ = 2120220122113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120220122094 and 2120220122103.

It is not an unprimeable number, because it can be changed into a prime (2120220122131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11135460 + ... + 11324261.

It is an arithmetic number, because the mean of its divisors is an integer number (135331054911).

Almost surely, 2^{2120220122121} is an apocalyptic number.

It is an amenable number.

2120220122121 is a deficient number, since it is larger than the sum of its proper divisors (1127725195743).

2120220122121 is a wasteful number, since it uses less digits than its factorization.

2120220122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22460361 (or 22460358 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2120220122121 its reverse (1212210220212), we get a palindrome (3332430342333).

The spelling of 2120220122121 in words is "two trillion, one hundred twenty billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".