1202120011021 has 4 divisors (see below), whose sum is σ = 1204062047200. Its totient is φ = 1200177974844.

The previous prime is 1202120010961. The next prime is 1202120011033. The reversal of 1202120011021 is 1201100212021.

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 1202120011021 - 2¹⁷ = 1202119879949 is a prime.

It is a super-2 number, since 2×1202120011021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202120010992 and 1202120011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120011121) 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, 971017161 + ... + 971018398.

It is an arithmetic number, because the mean of its divisors is an integer number (301015511800).

Almost surely, 2^{1202120011021} is an apocalyptic number.

It is an amenable number.

1202120011021 is a deficient number, since it is larger than the sum of its proper divisors (1942036179).

1202120011021 is an equidigital number, since it uses as much as digits as its factorization.

1202120011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942036178.

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

Adding to 1202120011021 its reverse (1201100212021), we get a palindrome (2403220223042).

The spelling of 1202120011021 in words is "one trillion, two hundred two billion, one hundred twenty million, eleven thousand, twenty-one".