120012001221 has 32 divisors (see below), whose sum is σ = 187873056000. Its totient is φ = 66713771520.

The previous prime is 120012001183. The next prime is 120012001229. The reversal of 120012001221 is 122100210021.

It is not a de Polignac number, because 120012001221 - 2¹⁷ = 120011870149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120012001197 and 120012001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012001229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100795 + ... + 500183.

It is an arithmetic number, because the mean of its divisors is an integer number (5871033000).

Almost surely, 2^120012001221 is an apocalyptic number.

It is an amenable number.

120012001221 is a deficient number, since it is larger than the sum of its proper divisors (67861054779).

120012001221 is a wasteful number, since it uses less digits than its factorization.

120012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399789.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120012001221 its reverse (122100210021), we get a palindrome (242112211242).

It can be divided in two parts, 1200120012 and 21, that multiplied together give a palindrome (25202520252).

The spelling of 120012001221 in words is "one hundred twenty billion, twelve million, one thousand, two hundred twenty-one".