120021221111001 has 32 divisors (see below), whose sum is σ = 188081722303488. Its totient is φ = 66660651445440.

The previous prime is 120021221110963. The next prime is 120021221111041. The reversal of 120021221111001 is 100111122120021.

It is a happy number.

It is not a de Polignac number, because 120021221111001 - 2⁶ = 120021221110937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120021221111041) 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, 503786415 + ... + 504024596.

It is an arithmetic number, because the mean of its divisors is an integer number (5877553821984).

Almost surely, 2^{120021221111001} is an apocalyptic number.

It is an amenable number.

120021221111001 is a deficient number, since it is larger than the sum of its proper divisors (68060501192487).

120021221111001 is a wasteful number, since it uses less digits than its factorization.

120021221111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007811181.

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

Adding to 120021221111001 its reverse (100111122120021), we get a palindrome (220132343231022).

The spelling of 120021221111001 in words is "one hundred twenty trillion, twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one".