21212113001 has 8 divisors (see below), whose sum is σ = 22840561440. Its totient is φ = 19625962048.

The previous prime is 21212112989. The next prime is 21212113007. The reversal of 21212113001 is 10031121212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212113001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212113007) 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, 10573331 + ... + 10575336.

It is an arithmetic number, because the mean of its divisors is an integer number (2855070180).

Almost surely, 2^21212113001 is an apocalyptic number.

It is an amenable number.

21212113001 is a deficient number, since it is larger than the sum of its proper divisors (1628448439).

21212113001 is a wasteful number, since it uses less digits than its factorization.

21212113001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148743.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21212113001 its reverse (10031121212), we get a palindrome (31243234213).

It can be divided in two parts, 2121211 and 3001, that added together give a palindrome (2124212).

The spelling of 21212113001 in words is "twenty-one billion, two hundred twelve million, one hundred thirteen thousand, one".