40221220311345 has 32 divisors (see below), whose sum is σ = 65284379043840. Its totient is φ = 21143236066560.

The previous prime is 40221220311313. The next prime is 40221220311367. The reversal of 40221220311345 is 54311302212204.

It is a happy number.

It is not a de Polignac number, because 40221220311345 - 2⁵ = 40221220311313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64085974 + ... + 64710543.

It is an arithmetic number, because the mean of its divisors is an integer number (2040136845120).

Almost surely, 2^{40221220311345} is an apocalyptic number.

It is an amenable number.

40221220311345 is a deficient number, since it is larger than the sum of its proper divisors (25063158732495).

40221220311345 is a wasteful number, since it uses less digits than its factorization.

40221220311345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128796825.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 40221220311345 its reverse (54311302212204), we get a palindrome (94532522523549).

The spelling of 40221220311345 in words is "forty trillion, two hundred twenty-one billion, two hundred twenty million, three hundred eleven thousand, three hundred forty-five".