21001302012111 has 8 divisors (see below), whose sum is σ = 28055482152624. Its totient is φ = 13973994939840.

The previous prime is 21001302012101. The next prime is 21001302012137. The reversal of 21001302012111 is 11121020310012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21001302012111 - 2⁷ = 21001302011983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001302012101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6718265236 + ... + 6718268361.

It is an arithmetic number, because the mean of its divisors is an integer number (3506935269078).

Almost surely, 2^{21001302012111} is an apocalyptic number.

21001302012111 is a deficient number, since it is larger than the sum of its proper divisors (7054180140513).

21001302012111 is a wasteful number, since it uses less digits than its factorization.

21001302012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436534121.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21001302012111 its reverse (11121020310012), we get a palindrome (32122322322123).

The spelling of 21001302012111 in words is "twenty-one trillion, one billion, three hundred two million, twelve thousand, one hundred eleven".