145220354031021 has 8 divisors (see below), whose sum is σ = 193740437216160. Its totient is φ = 96756920099952.

The previous prime is 145220354031017. The next prime is 145220354031023. The reversal of 145220354031021 is 120130453022541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145220354031021 - 2² = 145220354031017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220354031023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14162307535 + ... + 14162317788.

It is an arithmetic number, because the mean of its divisors is an integer number (24217554652020).

Almost surely, 2^{145220354031021} is an apocalyptic number.

It is an amenable number.

145220354031021 is a deficient number, since it is larger than the sum of its proper divisors (48520083185139).

145220354031021 is a wasteful number, since it uses less digits than its factorization.

145220354031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28324627035.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 145220354031021 in words is "one hundred forty-five trillion, two hundred twenty billion, three hundred fifty-four million, thirty-one thousand, twenty-one".