21131121301122 has 32 divisors (see below), whose sum is σ = 49020596969472. Its totient is φ = 5947351836624.

The previous prime is 21131121301097. The next prime is 21131121301123. The reversal of 21131121301122 is 22110312113112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21131121301123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3754638498 + ... + 3754644125.

It is an arithmetic number, because the mean of its divisors is an integer number (1531893655296).

Almost surely, 2^{21131121301122} is an apocalyptic number.

21131121301122 is an abundant number, since it is smaller than the sum of its proper divisors (27889475668350).

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

21131121301122 is a wasteful number, since it uses less digits than its factorization.

21131121301122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509282702.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21131121301122 its reverse (22110312113112), we get a palindrome (43241433414234).

The spelling of 21131121301122 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred one thousand, one hundred twenty-two".