1201102012021 has 4 divisors (see below), whose sum is σ = 1209163099500. Its totient is φ = 1193040924544.

The previous prime is 1201102011911. The next prime is 1201102012031. The reversal of 1201102012021 is 1202102011021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57175504996 + 1143926507025 = 239114^2 + 1069545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201102012021 - 2¹¹ = 1201102009973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201102011992 and 1201102012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201102012031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4030543516 + ... + 4030543813.

It is an arithmetic number, because the mean of its divisors is an integer number (302290774875).

Almost surely, 2^{1201102012021} is an apocalyptic number.

It is an amenable number.

1201102012021 is a deficient number, since it is larger than the sum of its proper divisors (8061087479).

1201102012021 is an equidigital number, since it uses as much as digits as its factorization.

1201102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061087478.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201102012021 its reverse (1202102011021), we get a palindrome (2403204023042).

The spelling of 1201102012021 in words is "one trillion, two hundred one billion, one hundred two million, twelve thousand, twenty-one".