21121200220010 has 32 divisors (see below), whose sum is σ = 41689249877952. Its totient is φ = 7640641428480.

The previous prime is 21121200220007. The next prime is 21121200220019. The reversal of 21121200220010 is 1002200212112.

It is a super-2 number, since 2×21121200220010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121200220019) 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, 497416364 + ... + 497458823.

It is an arithmetic number, because the mean of its divisors is an integer number (1302789058686).

Almost surely, 2^{21121200220010} is an apocalyptic number.

21121200220010 is a deficient number, since it is larger than the sum of its proper divisors (20568049657942).

21121200220010 is a wasteful number, since it uses less digits than its factorization.

21121200220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994875398.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121200220010 its reverse (1002200212112), we get a palindrome (22123400432122).

The spelling of 21121200220010 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, two hundred twenty thousand, ten".