10211221012011 has 12 divisors (see below), whose sum is σ = 14232653359848. Its totient is φ = 6511503253024.

The previous prime is 10211221012009. The next prime is 10211221012019. The reversal of 10211221012011 is 11021012211201.

It is a happy number.

It is not a de Polignac number, because 10211221012011 - 2¹ = 10211221012009 is a prime.

It is a super-2 number, since 2×10211221012011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10211221012019) 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, 3217144290 + ... + 3217147463.

It is an arithmetic number, because the mean of its divisors is an integer number (1186054446654).

Almost surely, 2^{10211221012011} is an apocalyptic number.

10211221012011 is a deficient number, since it is larger than the sum of its proper divisors (4021432347837).

10211221012011 is an equidigital number, since it uses as much as digits as its factorization.

10211221012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6434291802 (or 6434291779 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10211221012011 its reverse (11021012211201), we get a palindrome (21232233223212).

The spelling of 10211221012011 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, twelve thousand, eleven".