2021123130 has 32 divisors (see below), whose sum is σ = 5223826944. Its totient is φ = 497507136.

The previous prime is 2021123099. The next prime is 2021123131. The reversal of 2021123130 is 313211202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2021123131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2590794 + ... + 2591573.

It is an arithmetic number, because the mean of its divisors is an integer number (163244592).

Almost surely, 2^2021123130 is an apocalyptic number.

2021123130 is an abundant number, since it is smaller than the sum of its proper divisors (3202703814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021123130 is a wasteful number, since it uses less digits than its factorization.

2021123130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5182390.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2021123130 is about 44956.9030294570. The cubic root of 2021123130 is about 1264.3411046807.

Adding to 2021123130 its reverse (313211202), we get a palindrome (2334334332).

The spelling of 2021123130 in words is "two billion, twenty-one million, one hundred twenty-three thousand, one hundred thirty".