21203013133011 has 16 divisors (see below), whose sum is σ = 29465968363520. Its totient is φ = 13546553952960.

The previous prime is 21203013132979. The next prime is 21203013133079. The reversal of 21203013133011 is 11033131030212.

It is a happy number.

It is not a de Polignac number, because 21203013133011 - 2⁵ = 21203013132979 is a prime.

It is a super-2 number, since 2×21203013133011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203013133811) 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, 1106735026 + ... + 1106754183.

It is an arithmetic number, because the mean of its divisors is an integer number (1841623022720).

Almost surely, 2^{21203013133011} is an apocalyptic number.

21203013133011 is a deficient number, since it is larger than the sum of its proper divisors (8262955230509).

21203013133011 is a wasteful number, since it uses less digits than its factorization.

21203013133011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213489346.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21203013133011 its reverse (11033131030212), we get a palindrome (32236144163223).

The spelling of 21203013133011 in words is "twenty-one trillion, two hundred three billion, thirteen million, one hundred thirty-three thousand, eleven".