1021146551 has 2 divisors, whose sum is σ = 1021146552. Its totient is φ = 1021146550.

The previous prime is 1021146509. The next prime is 1021146587. The reversal of 1021146551 is 1556411201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021146551 - 2²² = 1016952247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021146551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021146251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510573275 + 510573276.

It is an arithmetic number, because the mean of its divisors is an integer number (510573276).

Almost surely, 2^1021146551 is an apocalyptic number.

1021146551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021146551 is an equidigital number, since it uses as much as digits as its factorization.

1021146551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1021146551 is about 31955.3837561059. The cubic root of 1021146551 is about 1006.9997396575. Note that the first 3 decimals are identical.

Adding to 1021146551 its reverse (1556411201), we get a palindrome (2577557752).

The spelling of 1021146551 in words is "one billion, twenty-one million, one hundred forty-six thousand, five hundred fifty-one".