21211010120122 has 8 divisors (see below), whose sum is σ = 32000425673076. Its totient is φ = 10544201562432.

The previous prime is 21211010120093. The next prime is 21211010120137. The reversal of 21211010120122 is 22102101011212.

It can be written as a sum of positive squares in 2 ways, for example, as 19895444705761 + 1315565414361 = 4460431^2 + 1146981^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21211010120096 and 21211010120105.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30651748383 + ... + 30651749074.

Almost surely, 2^{21211010120122} is an apocalyptic number.

21211010120122 is a deficient number, since it is larger than the sum of its proper divisors (10789415552954).

21211010120122 is a wasteful number, since it uses less digits than its factorization.

21211010120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61303497632.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211010120122 its reverse (22102101011212), we get a palindrome (43313111131334).

The spelling of 21211010120122 in words is "twenty-one trillion, two hundred eleven billion, ten million, one hundred twenty thousand, one hundred twenty-two".