21050201013 has 16 divisors (see below), whose sum is σ = 29351366016. Its totient is φ = 13393923840.

The previous prime is 21050201009. The next prime is 21050201021. The reversal of 21050201013 is 31010205012.

It is not a de Polignac number, because 21050201013 - 2² = 21050201009 is a prime.

It is a super-2 number, since 2×21050201013² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21050200983 and 21050201001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050201083) 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, 302248 + ... + 365313.

It is an arithmetic number, because the mean of its divisors is an integer number (1834460376).

Almost surely, 2^21050201013 is an apocalyptic number.

21050201013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21050201013 is a deficient number, since it is larger than the sum of its proper divisors (8301165003).

21050201013 is a wasteful number, since it uses less digits than its factorization.

21050201013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668044.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21050201013 its reverse (31010205012), we get a palindrome (52060406025).

The spelling of 21050201013 in words is "twenty-one billion, fifty million, two hundred one thousand, thirteen".