21100122212002 has 16 divisors (see below), whose sum is σ = 33033877487352. Its totient is φ = 10098539850880.

The previous prime is 21100122211921. The next prime is 21100122212011. The reversal of 21100122212002 is 20021222100112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12555322135801 + 8544800076201 = 3543349^2 + 2923149^2 .

It is a super-2 number, since 2×21100122212002² (a number of 27 digits) contains 22 as substring.

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, 2427529273 + ... + 2427537964.

Almost surely, 2^{21100122212002} is an apocalyptic number.

21100122212002 is a deficient number, since it is larger than the sum of its proper divisors (11933755275350).

21100122212002 is a wasteful number, since it uses less digits than its factorization.

21100122212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855067333.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21100122212002 its reverse (20021222100112), we get a palindrome (41121344312114).

The spelling of 21100122212002 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred twelve thousand, two".