21200351031013 has 96 divisors (see below), whose sum is σ = 27621182324736. Its totient is φ = 15911311680000.

The previous prime is 21200351031011. The next prime is 21200351031023. The reversal of 21200351031013 is 31013015300212.

It is not a de Polignac number, because 21200351031013 - 2¹ = 21200351031011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200351031011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5296113670 + ... + 5296117672.

It is an arithmetic number, because the mean of its divisors is an integer number (287720649216).

Almost surely, 2^{21200351031013} is an apocalyptic number.

It is an amenable number.

21200351031013 is a deficient number, since it is larger than the sum of its proper divisors (6420831293723).

21200351031013 is a wasteful number, since it uses less digits than its factorization.

21200351031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967 (or 4956 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 21200351031013 its reverse (31013015300212), we get a palindrome (52213366331225).

The spelling of 21200351031013 in words is "twenty-one trillion, two hundred billion, three hundred fifty-one million, thirty-one thousand, thirteen".