21143003001 has 16 divisors (see below), whose sum is σ = 29358504000. Its totient is φ = 13517943488.

The previous prime is 21143002987. The next prime is 21143003047. The reversal of 21143003001 is 10030034112.

It is a cyclic number.

It is not a de Polignac number, because 21143003001 - 2¹⁰ = 21143001977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21143023001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802551 + ... + 828476.

It is an arithmetic number, because the mean of its divisors is an integer number (1834906500).

Almost surely, 2^21143003001 is an apocalyptic number.

It is an amenable number.

21143003001 is a deficient number, since it is larger than the sum of its proper divisors (8215500999).

21143003001 is a wasteful number, since it uses less digits than its factorization.

21143003001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631208.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21143003001 its reverse (10030034112), we get a palindrome (31173037113).

The spelling of 21143003001 in words is "twenty-one billion, one hundred forty-three million, three thousand, one".