21111211002122 has 8 divisors (see below), whose sum is σ = 31762486644672. Its totient is φ = 10523715453900.

The previous prime is 21111211002073. The next prime is 21111211002137. The reversal of 21111211002122 is 22120011211112.

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

It is a super-2 number, since 2×21111211002122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21111211002122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15945022754 + ... + 15945024077.

It is an arithmetic number, because the mean of its divisors is an integer number (3970310830584).

Almost surely, 2^{21111211002122} is an apocalyptic number.

21111211002122 is a deficient number, since it is larger than the sum of its proper divisors (10651275642550).

21111211002122 is a wasteful number, since it uses less digits than its factorization.

21111211002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31890047164.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21111211002122 its reverse (22120011211112), we get a palindrome (43231222213234).

The spelling of 21111211002122 in words is "twenty-one trillion, one hundred eleven billion, two hundred eleven million, two thousand, one hundred twenty-two".