21012011319 has 32 divisors (see below), whose sum is σ = 30402860544. Its totient is φ = 12831361920.

The previous prime is 21012011299. The next prime is 21012011347. The reversal of 21012011319 is 91311021012.

It is a happy number.

It is not a de Polignac number, because 21012011319 - 2⁷ = 21012011191 is a prime.

It is a super-2 number, since 2×21012011319² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012011295 and 21012011304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012011519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6017164 + ... + 6020654.

It is an arithmetic number, because the mean of its divisors is an integer number (950089392).

Almost surely, 2^21012011319 is an apocalyptic number.

21012011319 is a deficient number, since it is larger than the sum of its proper divisors (9390849225).

21012011319 is a wasteful number, since it uses less digits than its factorization.

21012011319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4647.

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 21012011319 in words is "twenty-one billion, twelve million, eleven thousand, three hundred nineteen".