11211002020457 has 2 divisors, whose sum is σ = 11211002020458. Its totient is φ = 11211002020456.

The previous prime is 11211002020447. The next prime is 11211002020489. The reversal of 11211002020457 is 75402020011211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5700734039641 + 5510267980816 = 2387621^2 + 2347396^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211002020457 - 2²⁰ = 11211000971881 is a prime.

It is a super-3 number, since 3×11211002020457³ (a number of 40 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (11211002020447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605501010228 + 5605501010229.

It is an arithmetic number, because the mean of its divisors is an integer number (5605501010229).

Almost surely, 2^{11211002020457} is an apocalyptic number.

It is an amenable number.

11211002020457 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211002020457 is an equidigital number, since it uses as much as digits as its factorization.

11211002020457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 11211002020457 its reverse (75402020011211), we get a palindrome (86613022031668).

The spelling of 11211002020457 in words is "eleven trillion, two hundred eleven billion, two million, twenty thousand, four hundred fifty-seven".