101002120445 has 24 divisors (see below), whose sum is σ = 123536885472. Its totient is φ = 79256374560.

The previous prime is 101002120399. The next prime is 101002120447. The reversal of 101002120445 is 544021200101.

It is a happy number.

It is not a de Polignac number, because 101002120445 - 2³⁰ = 99928378621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002120447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101918900 + ... + 101919890.

It is an arithmetic number, because the mean of its divisors is an integer number (5147370228).

Almost surely, 2^101002120445 is an apocalyptic number.

It is an amenable number.

101002120445 is a deficient number, since it is larger than the sum of its proper divisors (22534765027).

101002120445 is an frugal number, since it uses more digits than its factorization.

101002120445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 101002120445 its reverse (544021200101), we get a palindrome (645023320546).

The spelling of 101002120445 in words is "one hundred one billion, two million, one hundred twenty thousand, four hundred forty-five".