21120121000010 has 64 divisors (see below), whose sum is σ = 40415689480320. Its totient is φ = 7923972925440.

The previous prime is 21120121000009. The next prime is 21120121000019. The reversal of 21120121000010 is 1000012102112.

It is a super-2 number, since 2×21120121000010² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120120999955 and 21120121000000.

It is not an unprimeable number, because it can be changed into a prime (21120121000019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9797534 + ... + 11757206.

It is an arithmetic number, because the mean of its divisors is an integer number (631495148130).

Almost surely, 2^{21120121000010} is an apocalyptic number.

21120121000010 is a deficient number, since it is larger than the sum of its proper divisors (19295568480310).

21120121000010 is a wasteful number, since it uses less digits than its factorization.

21120121000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960263.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21120121000010 its reverse (1000012102112), we get a palindrome (22120133102122).

The spelling of 21120121000010 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, ten", and thus it is an aban number.