20121624001 has 2 divisors, whose sum is σ = 20121624002. Its totient is φ = 20121624000.

The previous prime is 20121623959. The next prime is 20121624013. The reversal of 20121624001 is 10042612102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19894820401 + 226803600 = 141049^2 + 15060^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121624001 - 2¹¹ = 20121621953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20121624001.

It is not a weakly prime, because it can be changed into another prime (20121624091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060812000 + 10060812001.

It is an arithmetic number, because the mean of its divisors is an integer number (10060812001).

Almost surely, 2^20121624001 is an apocalyptic number.

It is an amenable number.

20121624001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121624001 is an equidigital number, since it uses as much as digits as its factorization.

20121624001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 20121624001 in words is "twenty billion, one hundred twenty-one million, six hundred twenty-four thousand, one".