21211002212001 has 32 divisors (see below), whose sum is σ = 33054237546240. Its totient is φ = 11848744986624.

The previous prime is 21211002211999. The next prime is 21211002212003. The reversal of 21211002212001 is 10021220011212.

It is an interprime number because it is at equal distance from previous prime (21211002211999) and next prime (21211002212003).

It is not a de Polignac number, because 21211002212001 - 2¹ = 21211002211999 is a prime.

It is a super-2 number, since 2×21211002212001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211002212003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61049206 + ... + 61395663.

It is an arithmetic number, because the mean of its divisors is an integer number (1032944923320).

Almost surely, 2^{21211002212001} is an apocalyptic number.

21211002212001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21211002212001 is a deficient number, since it is larger than the sum of its proper divisors (11843235334239).

21211002212001 is a wasteful number, since it uses less digits than its factorization.

21211002212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122445065.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21211002212001 its reverse (10021220011212), we get a palindrome (31232222223213).

The spelling of 21211002212001 in words is "twenty-one trillion, two hundred eleven billion, two million, two hundred twelve thousand, one".