10211220112121 has 16 divisors (see below), whose sum is σ = 12073594272000. Its totient is φ = 8449813850688.

The previous prime is 10211220112117. The next prime is 10211220112127. The reversal of 10211220112121 is 12121102211201.

10211220112121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10211220112121 - 2² = 10211220112117 is a prime.

It is a super-2 number, since 2×10211220112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10211220112121.

It is not an unprimeable number, because it can be changed into a prime (10211220112127) 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, 508325 + ... + 4547618.

It is an arithmetic number, because the mean of its divisors is an integer number (754599642000).

Almost surely, 2^{10211220112121} is an apocalyptic number.

It is an amenable number.

10211220112121 is a deficient number, since it is larger than the sum of its proper divisors (1862374159879).

10211220112121 is an equidigital number, since it uses as much as digits as its factorization.

10211220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065928.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10211220112121 its reverse (12121102211201), we get a palindrome (22332322323322).

The spelling of 10211220112121 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".