20121244379 has 2 divisors, whose sum is σ = 20121244380. Its totient is φ = 20121244378.

The previous prime is 20121244343. The next prime is 20121244433. The reversal of 20121244379 is 97344212102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121244379 - 2²⁸ = 19852808923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121244309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060622189 + 10060622190.

It is an arithmetic number, because the mean of its divisors is an integer number (10060622190).

Almost surely, 2^20121244379 is an apocalyptic number.

20121244379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121244379 is an equidigital number, since it uses as much as digits as its factorization.

20121244379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 20121244379 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, three hundred seventy-nine".