1021220113345 has 16 divisors (see below), whose sum is σ = 1226636208000. Its totient is φ = 816194966400.

The previous prime is 1021220113297. The next prime is 1021220113349. The reversal of 1021220113345 is 5433110221201.

It is not a de Polignac number, because 1021220113345 - 2¹⁷ = 1021219982273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021220113349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41671906 + ... + 41696404.

It is an arithmetic number, because the mean of its divisors is an integer number (76664763000).

Almost surely, 2^{1021220113345} is an apocalyptic number.

It is an amenable number.

1021220113345 is a deficient number, since it is larger than the sum of its proper divisors (205416094655).

1021220113345 is a wasteful number, since it uses less digits than its factorization.

1021220113345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32136.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1021220113345 its reverse (5433110221201), we get a palindrome (6454330334546).

The spelling of 1021220113345 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred thirteen thousand, three hundred forty-five".