20121130999 has 2 divisors, whose sum is σ = 20121131000. Its totient is φ = 20121130998.

The previous prime is 20121130949. The next prime is 20121131053. The reversal of 20121130999 is 99903112102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121130999 - 2¹³ = 20121122807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121130919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060565499 + 10060565500.

It is an arithmetic number, because the mean of its divisors is an integer number (10060565500).

Almost surely, 2^20121130999 is an apocalyptic number.

20121130999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121130999 is an equidigital number, since it uses as much as digits as its factorization.

20121130999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 20121130999 in words is "twenty billion, one hundred twenty-one million, one hundred thirty thousand, nine hundred ninety-nine".