120001210111221 has 8 divisors (see below), whose sum is σ = 160183227121344. Its totient is φ = 79909999920960.

The previous prime is 120001210111213. The next prime is 120001210111229. The reversal of 120001210111221 is 122111012100021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120001210111213) and next prime (120001210111229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120001210111221 - 2³ = 120001210111213 is a prime.

It is a super-2 number, since 2×120001210111221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120001210111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001210111229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22701701881 + ... + 22701707166.

It is an arithmetic number, because the mean of its divisors is an integer number (20022903390168).

Almost surely, 2^{120001210111221} is an apocalyptic number.

It is an amenable number.

120001210111221 is a deficient number, since it is larger than the sum of its proper divisors (40182017010123).

120001210111221 is an equidigital number, since it uses as much as digits as its factorization.

120001210111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45403409931.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 120001210111221 its reverse (122111012100021), we get a palindrome (242112222211242).

The spelling of 120001210111221 in words is "one hundred twenty trillion, one billion, two hundred ten million, one hundred eleven thousand, two hundred twenty-one".