20121142403 has 2 divisors, whose sum is σ = 20121142404. Its totient is φ = 20121142402.

The previous prime is 20121142399. The next prime is 20121142423. The reversal of 20121142403 is 30424112102.

It is an a-pointer prime, because the next prime (20121142423) can be obtained adding 20121142403 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121142403 - 2² = 20121142399 is a prime.

It is a super-2 number, since 2×20121142403² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20121142423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060571201 + 10060571202.

It is an arithmetic number, because the mean of its divisors is an integer number (10060571202).

Almost surely, 2^20121142403 is an apocalyptic number.

20121142403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121142403 is an equidigital number, since it uses as much as digits as its factorization.

20121142403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20121142403 its reverse (30424112102), we get a palindrome (50545254505).

The spelling of 20121142403 in words is "twenty billion, one hundred twenty-one million, one hundred forty-two thousand, four hundred three".