13123021420 has 48 divisors (see below), whose sum is σ = 28775204640. Its totient is φ = 5020811264.

The previous prime is 13123021367. The next prime is 13123021423. The reversal of 13123021420 is 2412032131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13123021423) 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, 43669 + ... + 167788.

It is an arithmetic number, because the mean of its divisors is an integer number (599483430).

Almost surely, 2^13123021420 is an apocalyptic number.

13123021420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123021420 is an abundant number, since it is smaller than the sum of its proper divisors (15652183220).

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

13123021420 is a wasteful number, since it uses less digits than its factorization.

13123021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211602 (or 211600 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13123021420 its reverse (2412032131), we get a palindrome (15535053551).

The spelling of 13123021420 in words is "thirteen billion, one hundred twenty-three million, twenty-one thousand, four hundred twenty".