145012155021 has 48 divisors (see below), whose sum is σ = 220833333760. Its totient is φ = 91597858560.

The previous prime is 145012155017. The next prime is 145012155059. The reversal of 145012155021 is 120551210541.

It is a happy number.

145012155021 is a `hidden beast` number, since 1 + 4 + 501 + 2 + 155 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 145012155021 - 2² = 145012155017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145012155221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1882656 + ... + 1958166.

Almost surely, 2^145012155021 is an apocalyptic number.

It is an amenable number.

145012155021 is a deficient number, since it is larger than the sum of its proper divisors (75821178739).

145012155021 is a wasteful number, since it uses less digits than its factorization.

145012155021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75706 (or 75703 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 145012155021 its reverse (120551210541), we get a palindrome (265563365562).

The spelling of 145012155021 in words is "one hundred forty-five billion, twelve million, one hundred fifty-five thousand, twenty-one".