2021140121 has 24 divisors (see below), whose sum is σ = 2728626624. Its totient is φ = 1453757760.

The previous prime is 2021140109. The next prime is 2021140129. The reversal of 2021140121 is 1210411202.

It is a happy number.

It is not a de Polignac number, because 2021140121 - 2¹⁴ = 2021123737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021140096 and 2021140105.

It is not an unprimeable number, because it can be changed into a prime (2021140129) 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, 64646 + ... + 90671.

It is an arithmetic number, because the mean of its divisors is an integer number (113692776).

Almost surely, 2^2021140121 is an apocalyptic number.

It is an amenable number.

2021140121 is a deficient number, since it is larger than the sum of its proper divisors (707486503).

2021140121 is a wasteful number, since it uses less digits than its factorization.

2021140121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155361 (or 155348 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2021140121 is about 44957.0919989272. The cubic root of 2021140121 is about 1264.3446476546.

Adding to 2021140121 its reverse (1210411202), we get a palindrome (3231551323).

The spelling of 2021140121 in words is "two billion, twenty-one million, one hundred forty thousand, one hundred twenty-one".