1202122231021 has 4 divisors (see below), whose sum is σ = 1272835303452. Its totient is φ = 1131409158592.

The previous prime is 1202122231003. The next prime is 1202122231091. The reversal of 1202122231021 is 1201322212021.

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 658637749225 + 543484481796 = 811565^2 + 737214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202122231021 - 2¹⁵ = 1202122198253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202122231021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202122231001) 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, 35356536190 + ... + 35356536223.

It is an arithmetic number, because the mean of its divisors is an integer number (318208825863).

Almost surely, 2^{1202122231021} is an apocalyptic number.

It is an amenable number.

1202122231021 is a deficient number, since it is larger than the sum of its proper divisors (70713072431).

1202122231021 is an equidigital number, since it uses as much as digits as its factorization.

1202122231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70713072430.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1202122231021 its reverse (1201322212021), we get a palindrome (2403444443042).

The spelling of 1202122231021 in words is "one trillion, two hundred two billion, one hundred twenty-two million, two hundred thirty-one thousand, twenty-one".