145521021124202 has 4 divisors (see below), whose sum is σ = 218281531686306. Its totient is φ = 72760510562100.

The previous prime is 145521021124153. The next prime is 145521021124217. The reversal of 145521021124202 is 202421120125541.

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

It can be written as a sum of positive squares in only one way, i.e., 125838834919681 + 19682186204521 = 11217791^2 + 4436461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36380255281049 + ... + 36380255281052.

Almost surely, 2^{145521021124202} is an apocalyptic number.

145521021124202 is a deficient number, since it is larger than the sum of its proper divisors (72760510562104).

145521021124202 is an equidigital number, since it uses as much as digits as its factorization.

145521021124202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72760510562103.

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 145521021124202 its reverse (202421120125541), we get a palindrome (347942141249743).

The spelling of 145521021124202 in words is "one hundred forty-five trillion, five hundred twenty-one billion, twenty-one million, one hundred twenty-four thousand, two hundred two".