11011021999951 has 2 divisors, whose sum is σ = 11011021999952. Its totient is φ = 11011021999950.

The previous prime is 11011021999889. The next prime is 11011021999979. The reversal of 11011021999951 is 15999912011011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11011021999951 - 2³⁷ = 10873583046479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011021999895 and 11011021999904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011021999981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505510999975 + 5505510999976.

It is an arithmetic number, because the mean of its divisors is an integer number (5505510999976).

Almost surely, 2^{11011021999951} is an apocalyptic number.

11011021999951 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011021999951 is an equidigital number, since it uses as much as digits as its factorization.

11011021999951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 49.

The spelling of 11011021999951 in words is "eleven trillion, eleven billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred fifty-one".