21012201100022 has 16 divisors (see below), whose sum is σ = 34386745406400. Its totient is φ = 9550127276040.

The previous prime is 21012201100001. The next prime is 21012201100027. The reversal of 21012201100022 is 22000110221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012201100027) 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, 43415072 + ... + 43896387.

It is an arithmetic number, because the mean of its divisors is an integer number (2149171587900).

Almost surely, 2^{21012201100022} is an apocalyptic number.

21012201100022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012201100022 is a deficient number, since it is larger than the sum of its proper divisors (13374544306378).

21012201100022 is a wasteful number, since it uses less digits than its factorization.

21012201100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87322411.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012201100022 its reverse (22000110221012), we get a palindrome (43012311321034).

The spelling of 21012201100022 in words is "twenty-one trillion, twelve billion, two hundred one million, one hundred thousand, twenty-two".