21211201201001 has 32 divisors (see below), whose sum is σ = 26643841920000. Its totient is φ = 16474774946112.

The previous prime is 21211201200977. The next prime is 21211201201009. The reversal of 21211201201001 is 10010210211212.

It is not a de Polignac number, because 21211201201001 - 2²² = 21211197006697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211201201009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25285451 + ... + 26110848.

It is an arithmetic number, because the mean of its divisors is an integer number (832620060000).

Almost surely, 2^{21211201201001} is an apocalyptic number.

It is an amenable number.

21211201201001 is a deficient number, since it is larger than the sum of its proper divisors (5432640718999).

21211201201001 is a wasteful number, since it uses less digits than its factorization.

21211201201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51396461.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211201201001 its reverse (10010210211212), we get a palindrome (31221411412213).

The spelling of 21211201201001 in words is "twenty-one trillion, two hundred eleven billion, two hundred one million, two hundred one thousand, one".