101221320030 has 32 divisors (see below), whose sum is σ = 243153507744. Its totient is φ = 26967647616.

The previous prime is 101221320007. The next prime is 101221320071. The reversal of 101221320030 is 30023122101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 101221319991 and 101221320009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510689 + ... + 1576268.

It is an arithmetic number, because the mean of its divisors is an integer number (7598547117).

Almost surely, 2^101221320030 is an apocalyptic number.

101221320030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221320030 is an abundant number, since it is smaller than the sum of its proper divisors (141932187714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101221320030 is a wasteful number, since it uses less digits than its factorization.

101221320030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088060.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 101221320030 its reverse (30023122101), we get a palindrome (131244442131).

The spelling of 101221320030 in words is "one hundred one billion, two hundred twenty-one million, three hundred twenty thousand, thirty".