21101133001 has 8 divisors (see below), whose sum is σ = 22734012224. Its totient is φ = 19469641680.

The previous prime is 21101132999. The next prime is 21101133029. The reversal of 21101133001 is 10033110112.

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 21101133001 - 2¹ = 21101132999 is a prime.

It is a super-3 number, since 3×21101133001³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101133071) 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, 315285 + ... + 376306.

It is an arithmetic number, because the mean of its divisors is an integer number (2841751528).

Almost surely, 2^21101133001 is an apocalyptic number.

It is an amenable number.

21101133001 is a deficient number, since it is larger than the sum of its proper divisors (1632879223).

21101133001 is a wasteful number, since it uses less digits than its factorization.

21101133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693951.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21101133001 its reverse (10033110112), we get a palindrome (31134243113).

The spelling of 21101133001 in words is "twenty-one billion, one hundred one million, one hundred thirty-three thousand, one".