10211220021121 has 12 divisors (see below), whose sum is σ = 11878426443888. Its totient is φ = 8752423859592.

The previous prime is 10211220021083. The next prime is 10211220021127. The reversal of 10211220021121 is 12112002211201.

It is not a de Polignac number, because 10211220021121 - 2¹⁵ = 10211219988353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211220021095 and 10211220021104.

It is not an unprimeable number, because it can be changed into a prime (10211220021127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9811650 + ... + 10802356.

It is an arithmetic number, because the mean of its divisors is an integer number (989868870324).

Almost surely, 2^{10211220021121} is an apocalyptic number.

It is an amenable number.

10211220021121 is a deficient number, since it is larger than the sum of its proper divisors (1667206422767).

10211220021121 is an equidigital number, since it uses as much as digits as its factorization.

10211220021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201068 (or 1201061 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10211220021121 its reverse (12112002211201), we get a palindrome (22323222232322).

The spelling of 10211220021121 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, one hundred twenty-one".