1201111102021 has 32 divisors (see below), whose sum is σ = 1268273664000. Its totient is φ = 1135294864704.

The previous prime is 1201111102013. The next prime is 1201111102031. The reversal of 1201111102021 is 1202011111021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201111102021 - 2³ = 1201111102013 is a prime.

It is a super-6 number, since 6×1201111102021⁶ (a number of 74 digits) contains 666666 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201111101992 and 1201111102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111102031) 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, 600854980 + ... + 600856978.

It is an arithmetic number, because the mean of its divisors is an integer number (39633552000).

Almost surely, 2^{1201111102021} is an apocalyptic number.

It is an amenable number.

1201111102021 is a deficient number, since it is larger than the sum of its proper divisors (67162561979).

1201111102021 is a wasteful number, since it uses less digits than its factorization.

1201111102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201111102021 its reverse (1202011111021), we get a palindrome (2403122213042).

The spelling of 1201111102021 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred two thousand, twenty-one".