1021225361023 has 4 divisors (see below), whose sum is σ = 1167114698320. Its totient is φ = 875336023728.

The previous prime is 1021225360963. The next prime is 1021225361041. The reversal of 1021225361023 is 3201635221201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021225361023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021225360982 and 1021225361000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021225361053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72944668638 + ... + 72944668651.

It is an arithmetic number, because the mean of its divisors is an integer number (291778674580).

Almost surely, 2^{1021225361023} is an apocalyptic number.

1021225361023 is a deficient number, since it is larger than the sum of its proper divisors (145889337297).

1021225361023 is an equidigital number, since it uses as much as digits as its factorization.

1021225361023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145889337296.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 1021225361023 in words is "one trillion, twenty-one billion, two hundred twenty-five million, three hundred sixty-one thousand, twenty-three".