780001211201 has 4 divisors (see below), whose sum is σ = 780118107012. Its totient is φ = 779884315392.

The previous prime is 780001211191. The next prime is 780001211203. The reversal of 780001211201 is 102112100087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 273696385600 + 506304825601 = 523160^2 + 711551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780001211201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780001211203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58437896 + ... + 58451241.

It is an arithmetic number, because the mean of its divisors is an integer number (195029526753).

Almost surely, 2^780001211201 is an apocalyptic number.

It is an amenable number.

780001211201 is a deficient number, since it is larger than the sum of its proper divisors (116895811).

780001211201 is a wasteful number, since it uses less digits than its factorization.

780001211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116895810.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 780001211201 its reverse (102112100087), we get a palindrome (882113311288).

The spelling of 780001211201 in words is "seven hundred eighty billion, one million, two hundred eleven thousand, two hundred one".