621122177212 has 12 divisors (see below), whose sum is σ = 1086980047776. Its totient is φ = 310556449280.

The previous prime is 621122177201. The next prime is 621122177213. The reversal of 621122177212 is 212771221126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621122177213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849364 + ... + 1401307.

It is an arithmetic number, because the mean of its divisors is an integer number (90581670648).

Almost surely, 2^621122177212 is an apocalyptic number.

It is an amenable number.

621122177212 is a deficient number, since it is larger than the sum of its proper divisors (465857870564).

621122177212 is a wasteful number, since it uses less digits than its factorization.

621122177212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319668 (or 2319666 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

Adding to 621122177212 its reverse (212771221126), we get a palindrome (833893398338).

The spelling of 621122177212 in words is "six hundred twenty-one billion, one hundred twenty-two million, one hundred seventy-seven thousand, two hundred twelve".