20121001403 has 2 divisors, whose sum is σ = 20121001404. Its totient is φ = 20121001402.

The previous prime is 20121001399. The next prime is 20121001409. The reversal of 20121001403 is 30410012102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121001403 - 2² = 20121001399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20121001409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060500701 + 10060500702.

It is an arithmetic number, because the mean of its divisors is an integer number (10060500702).

Almost surely, 2^20121001403 is an apocalyptic number.

20121001403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121001403 is an equidigital number, since it uses as much as digits as its factorization.

20121001403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20121001403 its reverse (30410012102), we get a palindrome (50531013505).

The spelling of 20121001403 in words is "twenty billion, one hundred twenty-one million, one thousand, four hundred three".