2021121112357 has 2 divisors, whose sum is σ = 2021121112358. Its totient is φ = 2021121112356.

The previous prime is 2021121112291. The next prime is 2021121112441. The reversal of 2021121112357 is 7532111211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371894495841 + 649226616516 = 1171279^2 + 805746^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021121112357 - 2³¹ = 2018973628709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021121113357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560556178 + 1010560556179.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560556179).

Almost surely, 2^{2021121112357} is an apocalyptic number.

It is an amenable number.

2021121112357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021121112357 is an equidigital number, since it uses as much as digits as its factorization.

2021121112357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 2021121112357 its reverse (7532111211202), we get a palindrome (9553232323559).

The spelling of 2021121112357 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, three hundred fifty-seven".