21202021120122 has 40 divisors (see below), whose sum is σ = 47662982564736. Its totient is φ = 7044319704168.

The previous prime is 21202021120087. The next prime is 21202021120123. The reversal of 21202021120122 is 22102112020212.

It is a happy number.

21202021120122 is a `hidden beast` number, since 212 + 0 + 20 + 211 + 201 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21202021120095 and 21202021120104.

It is not an unprimeable number, because it can be changed into a prime (21202021120123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 213104458 + ... + 213203925.

Almost surely, 2^{21202021120122} is an apocalyptic number.

21202021120122 is an abundant number, since it is smaller than the sum of its proper divisors (26460961444614).

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

21202021120122 is a wasteful number, since it uses less digits than its factorization.

21202021120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426308704 (or 426308695 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202021120122 its reverse (22102112020212), we get a palindrome (43304133140334).

The spelling of 21202021120122 in words is "twenty-one trillion, two hundred two billion, twenty-one million, one hundred twenty thousand, one hundred twenty-two".