212021119957 has 2 divisors, whose sum is σ = 212021119958. Its totient is φ = 212021119956.

The previous prime is 212021119939. The next prime is 212021119963. The reversal of 212021119957 is 759911120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190090768036 + 21930351921 = 435994^2 + 148089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021119957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021119967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010559978 + 106010559979.

It is an arithmetic number, because the mean of its divisors is an integer number (106010559979).

Almost surely, 2^212021119957 is an apocalyptic number.

It is an amenable number.

212021119957 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021119957 is an equidigital number, since it uses as much as digits as its factorization.

212021119957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 212021119957 in words is "two hundred twelve billion, twenty-one million, one hundred nineteen thousand, nine hundred fifty-seven".