21012222011001 has 8 divisors (see below), whose sum is σ = 30171395708160. Its totient is φ = 12930598160592.

The previous prime is 21012222010999. The next prime is 21012222011071. The reversal of 21012222011001 is 10011022221012.

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

It is not a de Polignac number, because 21012222011001 - 2¹ = 21012222010999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012222011071) 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, 269387461641 + ... + 269387461718.

It is an arithmetic number, because the mean of its divisors is an integer number (3771424463520).

Almost surely, 2^{21012222011001} is an apocalyptic number.

It is an amenable number.

21012222011001 is a deficient number, since it is larger than the sum of its proper divisors (9159173697159).

21012222011001 is a wasteful number, since it uses less digits than its factorization.

21012222011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538774923375.

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

Adding to 21012222011001 its reverse (10011022221012), we get a palindrome (31023244232013).

The spelling of 21012222011001 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, eleven thousand, one".