21121120012002 has 16 divisors (see below), whose sum is σ = 42285743887392. Its totient is φ = 7033122693440.

The previous prime is 21121120011983. The next prime is 21121120012021. The reversal of 21121120012002 is 20021002112112.

It is an interprime number because it is at equal distance from previous prime (21121120011983) and next prime (21121120012021).

It is a super-2 number, since 2×21121120012002² (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, 1812654663 + ... + 1812666314.

It is an arithmetic number, because the mean of its divisors is an integer number (2642858992962).

Almost surely, 2^{21121120012002} is an apocalyptic number.

21121120012002 is an abundant number, since it is smaller than the sum of its proper divisors (21164623875390).

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

21121120012002 is a wasteful number, since it uses less digits than its factorization.

21121120012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625321953.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121120012002 its reverse (20021002112112), we get a palindrome (41142122124114).

The spelling of 21121120012002 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, twelve thousand, two".