21111351014 has 16 divisors (see below), whose sum is σ = 34105346352. Its totient is φ = 9743016288.

The previous prime is 21111351011. The next prime is 21111351017. The reversal of 21111351014 is 41015311112.

It is an interprime number because it is at equal distance from previous prime (21111351011) and next prime (21111351017).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111351011) 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 7 ways as a sum of consecutive naturals, for example, 704297 + ... + 733659.

It is an arithmetic number, because the mean of its divisors is an integer number (2131584147).

Almost surely, 2^21111351014 is an apocalyptic number.

21111351014 is a deficient number, since it is larger than the sum of its proper divisors (12993995338).

21111351014 is a wasteful number, since it uses less digits than its factorization.

21111351014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57031.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 21111351014 its reverse (41015311112), we get a palindrome (62126662126).

The spelling of 21111351014 in words is "twenty-one billion, one hundred eleven million, three hundred fifty-one thousand, fourteen".