21012022220001 has 16 divisors (see below), whose sum is σ = 28054931385600. Its totient is φ = 13988565276048.

The previous prime is 21012022219957. The next prime is 21012022220009. The reversal of 21012022220001 is 10002222021012.

It is a de Polignac number, because none of the positive numbers 2^k-21012022220001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21012022220009) 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 15 ways as a sum of consecutive naturals, for example, 69060730 + ... + 69364316.

It is an arithmetic number, because the mean of its divisors is an integer number (1753433211600).

Almost surely, 2^{21012022220001} is an apocalyptic number.

It is an amenable number.

21012022220001 is a deficient number, since it is larger than the sum of its proper divisors (7042909165599).

21012022220001 is a wasteful number, since it uses less digits than its factorization.

21012022220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335548.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012022220001 its reverse (10002222021012), we get a palindrome (31014244241013).

The spelling of 21012022220001 in words is "twenty-one trillion, twelve billion, twenty-two million, two hundred twenty thousand, one".