120021221310 has 32 divisors (see below), whose sum is σ = 300574886400. Its totient is φ = 30614108448.

The previous prime is 120021221303. The next prime is 120021221317. The reversal of 120021221310 is 13122120021.

It is an interprime number because it is at equal distance from previous prime (120021221303) and next prime (120021221317).

It is a super-2 number, since 2×120021221310² (a number of 23 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 120021221310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021221317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86971210 + ... + 86972589.

It is an arithmetic number, because the mean of its divisors is an integer number (9392965200).

Almost surely, 2^120021221310 is an apocalyptic number.

120021221310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120021221310 is an abundant number, since it is smaller than the sum of its proper divisors (180553665090).

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

120021221310 is a wasteful number, since it uses less digits than its factorization.

120021221310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173943832.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 120021221310 its reverse (13122120021), we get a palindrome (133143341331).

The spelling of 120021221310 in words is "one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, three hundred ten".