1215106001 has 2 divisors, whose sum is σ = 1215106002. Its totient is φ = 1215106000.

The previous prime is 1215105989. The next prime is 1215106021. The reversal of 1215106001 is 1006015121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940342225 + 274763776 = 30665^2 + 16576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215106001 - 2²² = 1210911697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215106021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607553000 + 607553001.

It is an arithmetic number, because the mean of its divisors is an integer number (607553001).

Almost surely, 2^1215106001 is an apocalyptic number.

It is an amenable number.

1215106001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215106001 is an equidigital number, since it uses as much as digits as its factorization.

1215106001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1215106001 is about 34858.3706016216. The cubic root of 1215106001 is about 1067.0990220699.

The spelling of 1215106001 in words is "one billion, two hundred fifteen million, one hundred six thousand, one".