21011010012122 has 16 divisors (see below), whose sum is σ = 33941213376840. Its totient is φ = 9697288936512.

The previous prime is 21011010012119. The next prime is 21011010012163. The reversal of 21011010012122 is 22121001011012.

It can be written as a sum of positive squares in 4 ways, for example, as 20326040250481 + 684969761641 = 4508441^2 + 827629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21011010012097 and 21011010012106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586693 + ... + 6673800.

Almost surely, 2^{21011010012122} is an apocalyptic number.

21011010012122 is a deficient number, since it is larger than the sum of its proper divisors (12930203364718).

21011010012122 is a wasteful number, since it uses less digits than its factorization.

21011010012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358337.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011010012122 its reverse (22121001011012), we get a palindrome (43132011023134).

The spelling of 21011010012122 in words is "twenty-one trillion, eleven billion, ten million, twelve thousand, one hundred twenty-two".