1921013100007 has 2 divisors, whose sum is σ = 1921013100008. Its totient is φ = 1921013100006.

The previous prime is 1921013099987. The next prime is 1921013100049. The reversal of 1921013100007 is 7000013101291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1921013100007 - 2²³ = 1921004711399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921013103007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960506550003 + 960506550004.

It is an arithmetic number, because the mean of its divisors is an integer number (960506550004).

Almost surely, 2^{1921013100007} is an apocalyptic number.

1921013100007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921013100007 is an equidigital number, since it uses as much as digits as its factorization.

1921013100007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

Adding to 1921013100007 its reverse (7000013101291), we get a palindrome (8921026201298).

The spelling of 1921013100007 in words is "one trillion, nine hundred twenty-one billion, thirteen million, one hundred thousand, seven".