21121200002130 has 32 divisors (see below), whose sum is σ = 50691355858368. Its totient is φ = 5632267128000.

The previous prime is 21121200002099. The next prime is 21121200002131. The reversal of 21121200002130 is 3120000212112.

It is a super-2 number, since 2×21121200002130² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21121200002131) 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 15 ways as a sum of consecutive naturals, for example, 1356 + ... + 6499415.

It is an arithmetic number, because the mean of its divisors is an integer number (1584104870574).

Almost surely, 2^{21121200002130} is an apocalyptic number.

21121200002130 is an abundant number, since it is smaller than the sum of its proper divisors (29570155856238).

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

21121200002130 is a wasteful number, since it uses less digits than its factorization.

21121200002130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609082.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21121200002130 its reverse (3120000212112), we get a palindrome (24241200214242).

The spelling of 21121200002130 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, two thousand, one hundred thirty".