120021101109 has 80 divisors (see below), whose sum is σ = 224406483840. Its totient is φ = 62234593920.

The previous prime is 120021101099. The next prime is 120021101131. The reversal of 120021101109 is 901101120021.

It is a happy number.

It is not a de Polignac number, because 120021101109 - 2¹² = 120021097013 is a prime.

It is a super-2 number, since 2×120021101109² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120021101091 and 120021101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021101149) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 296899 + ... + 572879.

It is an arithmetic number, because the mean of its divisors is an integer number (2805081048).

Almost surely, 2^120021101109 is an apocalyptic number.

It is an amenable number.

120021101109 is a deficient number, since it is larger than the sum of its proper divisors (104385382731).

120021101109 is a wasteful number, since it uses less digits than its factorization.

120021101109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276072 (or 276063 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

It can be divided in two parts, 12002 and 1101109, that added together give a palindrome (1113111).

The spelling of 120021101109 in words is "one hundred twenty billion, twenty-one million, one hundred one thousand, one hundred nine".