121021211120057 has 2 divisors, whose sum is σ = 121021211120058. Its totient is φ = 121021211120056.

The previous prime is 121021211120009. The next prime is 121021211120129. The reversal of 121021211120057 is 750021112120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102371414751376 + 18649796368681 = 10117876^2 + 4318541^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021211120057 - 2²² = 121021206925753 is a prime.

It is a super-2 number, since 2×121021211120057² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121021211128057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510605560028 + 60510605560029.

It is an arithmetic number, because the mean of its divisors is an integer number (60510605560029).

Almost surely, 2^{121021211120057} is an apocalyptic number.

It is an amenable number.

121021211120057 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021211120057 is an equidigital number, since it uses as much as digits as its factorization.

121021211120057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 26.

Adding to 121021211120057 its reverse (750021112120121), we get a palindrome (871042323240178).

The spelling of 121021211120057 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, one hundred twenty thousand, fifty-seven".