20120121311 has 2 divisors, whose sum is σ = 20120121312. Its totient is φ = 20120121310.

The previous prime is 20120121247. The next prime is 20120121317. The reversal of 20120121311 is 11312102102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20120121311 - 2⁶ = 20120121247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120121317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060060655 + 10060060656.

It is an arithmetic number, because the mean of its divisors is an integer number (10060060656).

Almost surely, 2^20120121311 is an apocalyptic number.

20120121311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120121311 is an equidigital number, since it uses as much as digits as its factorization.

20120121311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20120121311 its reverse (11312102102), we get a palindrome (31432223413).

The spelling of 20120121311 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, three hundred eleven".