20120101109 has 2 divisors, whose sum is σ = 20120101110. Its totient is φ = 20120101108.

The previous prime is 20120101051. The next prime is 20120101123. The reversal of 20120101109 is 90110102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19921911025 + 198190084 = 141145^2 + 14078^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120101109 - 2¹² = 20120097013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120101159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060050554 + 10060050555.

It is an arithmetic number, because the mean of its divisors is an integer number (10060050555).

Almost surely, 2^20120101109 is an apocalyptic number.

It is an amenable number.

20120101109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120101109 is an equidigital number, since it uses as much as digits as its factorization.

20120101109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20120101109 in words is "twenty billion, one hundred twenty million, one hundred one thousand, one hundred nine".