21012302001 has 8 divisors (see below), whose sum is σ = 28023622240. Its totient is φ = 14004591552.

The previous prime is 21012301991. The next prime is 21012302021. The reversal of 21012302001 is 10020321012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21012302001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012302021) 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, 888835 + ... + 912168.

It is an arithmetic number, because the mean of its divisors is an integer number (3502952780).

Almost surely, 2^21012302001 is an apocalyptic number.

It is an amenable number.

21012302001 is a deficient number, since it is larger than the sum of its proper divisors (7011320239).

21012302001 is a wasteful number, since it uses less digits than its factorization.

21012302001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804895.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21012302001 its reverse (10020321012), we get a palindrome (31032623013).

The spelling of 21012302001 in words is "twenty-one billion, twelve million, three hundred two thousand, one".