21011101209983 has 8 divisors (see below), whose sum is σ = 22454964681552. Its totient is φ = 19590339554176.

The previous prime is 21011101209941. The next prime is 21011101210003. The reversal of 21011101209983 is 38990210111012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011101209983 - 2¹⁰ = 21011101208959 is a prime.

It is a super-2 number, since 2×21011101209983² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011101209913) 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, 5775452060 + ... + 5775455697.

It is an arithmetic number, because the mean of its divisors is an integer number (2806870585194).

Almost surely, 2^{21011101209983} is an apocalyptic number.

21011101209983 is a deficient number, since it is larger than the sum of its proper divisors (1443863471569).

21011101209983 is a wasteful number, since it uses less digits than its factorization.

21011101209983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11550907881.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 21011101209983 in words is "twenty-one trillion, eleven billion, one hundred one million, two hundred nine thousand, nine hundred eighty-three".