20120101031 has 2 divisors, whose sum is σ = 20120101032. Its totient is φ = 20120101030.

The previous prime is 20120100953. The next prime is 20120101033. The reversal of 20120101031 is 13010102102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120101031 is a prime.

It is a super-2 number, since 2×20120101031² (a number of 21 digits) contains 22 as substring.

Together with 20120101033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120101033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060050515 + 10060050516.

It is an arithmetic number, because the mean of its divisors is an integer number (10060050516).

Almost surely, 2^20120101031 is an apocalyptic number.

20120101031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120101031 is an equidigital number, since it uses as much as digits as its factorization.

20120101031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20120101031 its reverse (13010102102), we get a palindrome (33130203133).

The spelling of 20120101031 in words is "twenty billion, one hundred twenty million, one hundred one thousand, thirty-one".