1201110010021 has 4 divisors (see below), whose sum is σ = 1202470271392. Its totient is φ = 1199749748652.

The previous prime is 1201110009997. The next prime is 1201110010049. The reversal of 1201110010021 is 1200100111021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201110010021 - 2¹¹ = 1201110007973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201110010621) 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, 680129361 + ... + 680131126.

It is an arithmetic number, because the mean of its divisors is an integer number (300617567848).

Almost surely, 2^{1201110010021} is an apocalyptic number.

It is an amenable number.

1201110010021 is a deficient number, since it is larger than the sum of its proper divisors (1360261371).

1201110010021 is an equidigital number, since it uses as much as digits as its factorization.

1201110010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360261370.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1201110010021 its reverse (1200100111021), we get a palindrome (2401210121042).

The spelling of 1201110010021 in words is "one trillion, two hundred one billion, one hundred ten million, ten thousand, twenty-one".