1021225355641 has 4 divisors (see below), whose sum is σ = 1021231024384. Its totient is φ = 1021219686900.

The previous prime is 1021225355639. The next prime is 1021225355663. The reversal of 1021225355641 is 1465535221201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021225355641 - 2¹ = 1021225355639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021225355641.

It is not an unprimeable number, because it can be changed into a prime (1021225355611) 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, 2554965 + ... + 2927506.

It is an arithmetic number, because the mean of its divisors is an integer number (255307756096).

Almost surely, 2^{1021225355641} is an apocalyptic number.

It is an amenable number.

1021225355641 is a deficient number, since it is larger than the sum of its proper divisors (5668743).

1021225355641 is an equidigital number, since it uses as much as digits as its factorization.

1021225355641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5668742.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 1021225355641 in words is "one trillion, twenty-one billion, two hundred twenty-five million, three hundred fifty-five thousand, six hundred forty-one".