20120121021211 has 2 divisors, whose sum is σ = 20120121021212. Its totient is φ = 20120121021210.

The previous prime is 20120121021071. The next prime is 20120121021229. The reversal of 20120121021211 is 11212012102102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120121021211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120121021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060060510605 + 10060060510606.

It is an arithmetic number, because the mean of its divisors is an integer number (10060060510606).

Almost surely, 2^{20120121021211} is an apocalyptic number.

20120121021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120121021211 is an equidigital number, since it uses as much as digits as its factorization.

20120121021211 is an evil number, because the sum of its binary digits is even.

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

Adding to 20120121021211 its reverse (11212012102102), we get a palindrome (31332133123313).

The spelling of 20120121021211 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, two hundred eleven".