781220222101001 has 8 divisors (see below), whose sum is σ = 835068911854464. Its totient is φ = 729028415109280.

The previous prime is 781220222100949. The next prime is 781220222101003. The reversal of 781220222101001 is 100101222022187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 781220222101001 - 2⁶ = 781220222100937 is a prime.

It is a super-2 number, since 2×781220222101001² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781220222101003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414220689461 + ... + 414220691346.

It is an arithmetic number, because the mean of its divisors is an integer number (104383613981808).

Almost surely, 2^{781220222101001} is an apocalyptic number.

It is an amenable number.

781220222101001 is a deficient number, since it is larger than the sum of its proper divisors (53848689753463).

781220222101001 is a wasteful number, since it uses less digits than its factorization.

781220222101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828441380871.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 781220222101001 its reverse (100101222022187), we get a palindrome (881321444123188).

The spelling of 781220222101001 in words is "seven hundred eighty-one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred one thousand, one".