2021123144 has 16 divisors (see below), whose sum is σ = 3791527920. Its totient is φ = 1010049040.

The previous prime is 2021123131. The next prime is 2021123171. The reversal of 2021123144 is 4413211202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47042 + ... + 79089.

It is an arithmetic number, because the mean of its divisors is an integer number (236970495).

Almost surely, 2^2021123144 is an apocalyptic number.

It is an amenable number.

2021123144 is a deficient number, since it is larger than the sum of its proper divisors (1770404776).

2021123144 is a wasteful number, since it uses less digits than its factorization.

2021123144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128140 (or 128136 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2021123144 is about 44956.9031851617. The cubic root of 2021123144 is about 1264.3411076000.

Adding to 2021123144 its reverse (4413211202), we get a palindrome (6434334346).

The spelling of 2021123144 in words is "two billion, twenty-one million, one hundred twenty-three thousand, one hundred forty-four".