1111212092521 has 2 divisors, whose sum is σ = 1111212092522. Its totient is φ = 1111212092520.

The previous prime is 1111212092503. The next prime is 1111212092609. The reversal of 1111212092521 is 1252902121111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562740025600 + 548472066921 = 750160^2 + 740589^2 .

It is an emirp because it is prime and its reverse (1252902121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111212092521 - 2¹⁵ = 1111212059753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111212092521.

It is not a weakly prime, because it can be changed into another prime (1111212092321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555606046260 + 555606046261.

It is an arithmetic number, because the mean of its divisors is an integer number (555606046261).

Almost surely, 2^{1111212092521} is an apocalyptic number.

It is an amenable number.

1111212092521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111212092521 is an equidigital number, since it uses as much as digits as its factorization.

1111212092521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 28.

The spelling of 1111212092521 in words is "one trillion, one hundred eleven billion, two hundred twelve million, ninety-two thousand, five hundred twenty-one".