1021225356465 has 64 divisors (see below), whose sum is σ = 1724210675712. Its totient is φ = 515136512000.

The previous prime is 1021225356461. The next prime is 1021225356467. The reversal of 1021225356465 is 5646535221201.

It is not a de Polignac number, because 1021225356465 - 2² = 1021225356461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021225356461) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10958065 + ... + 11050865.

It is an arithmetic number, because the mean of its divisors is an integer number (26940791808).

Almost surely, 2^{1021225356465} is an apocalyptic number.

1021225356465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021225356465 is a deficient number, since it is larger than the sum of its proper divisors (702985319247).

1021225356465 is a wasteful number, since it uses less digits than its factorization.

1021225356465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93190.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 1021225356465 in words is "one trillion, twenty-one billion, two hundred twenty-five million, three hundred fifty-six thousand, four hundred sixty-five".