21012025242130 has 64 divisors (see below), whose sum is σ = 40790705356800. Its totient is φ = 7746922736640.

The previous prime is 21012025242121. The next prime is 21012025242137. The reversal of 21012025242130 is 3124252021012.

It is a junction number, because it is equal to n+sod(n) for n = 21012025242095 and 21012025242104.

It is not an unprimeable number, because it can be changed into a prime (21012025242137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247533595 + ... + 247618465.

It is an arithmetic number, because the mean of its divisors is an integer number (637354771200).

Almost surely, 2^{21012025242130} is an apocalyptic number.

21012025242130 is a deficient number, since it is larger than the sum of its proper divisors (19778680114670).

21012025242130 is a wasteful number, since it uses less digits than its factorization.

21012025242130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87659.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21012025242130 its reverse (3124252021012), we get a palindrome (24136277263142).

The spelling of 21012025242130 in words is "twenty-one trillion, twelve billion, twenty-five million, two hundred forty-two thousand, one hundred thirty".