21011233001 has 8 divisors (see below), whose sum is σ = 22940669664. Its totient is φ = 19085017120.

The previous prime is 21011232971. The next prime is 21011233007. The reversal of 21011233001 is 10033211012.

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 21011233001 - 2⁶ = 21011232937 is a prime.

It is a super-3 number, since 3×21011233001³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21011233007) 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, 791540 + ... + 817653.

It is an arithmetic number, because the mean of its divisors is an integer number (2867583708).

Almost surely, 2^21011233001 is an apocalyptic number.

It is an amenable number.

21011233001 is a deficient number, since it is larger than the sum of its proper divisors (1929436663).

21011233001 is a wasteful number, since it uses less digits than its factorization.

21011233001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610391.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21011233001 its reverse (10033211012), we get a palindrome (31044444013).

It can be divided in two parts, 210 and 11233001, that added together give a palindrome (11233211).

The spelling of 21011233001 in words is "twenty-one billion, eleven million, two hundred thirty-three thousand, one".