212973861453377 has 4 divisors (see below), whose sum is σ = 220317787710420. Its totient is φ = 205629935196336.

The previous prime is 212973861453347. The next prime is 212973861453401. The reversal of 212973861453377 is 773354168379212.

It is a Cunningham number, because it is equal to 14593624²+1.

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 111678312297616 + 101295549155761 = 10567796^2 + 10064569^2 .

It is a cyclic number.

It is not a de Polignac number, because 212973861453377 - 2¹² = 212973861449281 is a prime.

It is a super-3 number, since 3×212973861453377³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212973861453347) 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, 3671963128478 + ... + 3671963128535.

It is an arithmetic number, because the mean of its divisors is an integer number (55079446927605).

Almost surely, 2^{212973861453377} is an apocalyptic number.

It is an amenable number.

212973861453377 is a deficient number, since it is larger than the sum of its proper divisors (7343926257043).

212973861453377 is an equidigital number, since it uses as much as digits as its factorization.

212973861453377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7343926257042.

The product of its digits is 320060160, while the sum is 68.

The spelling of 212973861453377 in words is "two hundred twelve trillion, nine hundred seventy-three billion, eight hundred sixty-one million, four hundred fifty-three thousand, three hundred seventy-seven".