772011100021 has 32 divisors (see below), whose sum is σ = 934988687360. Its totient is φ = 622678021056.

The previous prime is 772011099997. The next prime is 772011100037. The reversal of 772011100021 is 120001110277.

It is not a de Polignac number, because 772011100021 - 2¹¹ = 772011097973 is a prime.

It is a super-2 number, since 2×772011100021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 772011099965 and 772011100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772011100051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81577336 + ... + 81586798.

It is an arithmetic number, because the mean of its divisors is an integer number (29218396480).

Almost surely, 2^772011100021 is an apocalyptic number.

It is an amenable number.

772011100021 is a deficient number, since it is larger than the sum of its proper divisors (162977587339).

772011100021 is a wasteful number, since it uses less digits than its factorization.

772011100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13553.

The product of its (nonzero) digits is 196, while the sum is 22.

Adding to 772011100021 its reverse (120001110277), we get a palindrome (892012210298).

The spelling of 772011100021 in words is "seven hundred seventy-two billion, eleven million, one hundred thousand, twenty-one".