21503100425001 has 32 divisors (see below), whose sum is σ = 31835477194752. Its totient is φ = 12826276706880.

The previous prime is 21503100424937. The next prime is 21503100425021. The reversal of 21503100425001 is 10052400130512.

It is a happy number.

It is not a de Polignac number, because 21503100425001 - 2⁶ = 21503100424937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21503100425021) 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, 48720625 + ... + 49159998.

It is an arithmetic number, because the mean of its divisors is an integer number (994858662336).

Almost surely, 2^{21503100425001} is an apocalyptic number.

It is an amenable number.

21503100425001 is a deficient number, since it is larger than the sum of its proper divisors (10332376769751).

21503100425001 is a wasteful number, since it uses less digits than its factorization.

21503100425001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97880813.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 21503100425001 its reverse (10052400130512), we get a palindrome (31555500555513).

The spelling of 21503100425001 in words is "twenty-one trillion, five hundred three billion, one hundred million, four hundred twenty-five thousand, one".