21122011121202 has 12 divisors (see below), whose sum is σ = 45764357429310. Its totient is φ = 7040670373728.

The previous prime is 21122011121201. The next prime is 21122011121209. The reversal of 21122011121202 is 20212111022112.

21122011121202 is a `hidden beast` number, since 211 + 220 + 1 + 11 + 21 + 202 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11639485365561 + 9482525755641 = 3411669^2 + 3079371^2 .

It is a super-2 number, since 2×21122011121202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173445062289 = 21122011121202 / (2 + 1 + 1 + 2 + 2 + 0 + 1 + 1 + 1 + 2 + 1 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (21122011121201) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 586722531127 + ... + 586722531162.

Almost surely, 2^{21122011121202} is an apocalyptic number.

21122011121202 is an abundant number, since it is smaller than the sum of its proper divisors (24642346308108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122011121202 is a wasteful number, since it uses less digits than its factorization.

21122011121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173445062297 (or 1173445062294 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21122011121202 its reverse (20212111022112), we get a palindrome (41334122143314).

The spelling of 21122011121202 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one hundred twenty-one thousand, two hundred two".