2021012122 has 16 divisors (see below), whose sum is σ = 3216891240. Its totient is φ = 948976128.

The previous prime is 2021012111. The next prime is 2021012129. The reversal of 2021012122 is 2212101202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1997285481 + 23726641 = 44691^2 + 4871^2 .

It is not an unprimeable number, because it can be changed into a prime (2021012129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49497 + ... + 80572.

Almost surely, 2^2021012122 is an apocalyptic number.

2021012122 is a deficient number, since it is larger than the sum of its proper divisors (1195879118).

2021012122 is a wasteful number, since it uses less digits than its factorization.

2021012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130545.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021012122 is about 44955.6684078882. The cubic root of 2021012122 is about 1264.3179567348.

Adding to 2021012122 its reverse (2212101202), we get a palindrome (4233113324).

The spelling of 2021012122 in words is "two billion, twenty-one million, twelve thousand, one hundred twenty-two".