1202011012021 has 4 divisors (see below), whose sum is σ = 1224690465132. Its totient is φ = 1179331558912.

The previous prime is 1202011012003. The next prime is 1202011012031. The reversal of 1202011012021 is 1202101102021.

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 965217827025 + 236793184996 = 982455^2 + 486614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202011012021 - 2²⁵ = 1201977457589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202011011992 and 1202011012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202011012031) 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, 11339726476 + ... + 11339726581.

It is an arithmetic number, because the mean of its divisors is an integer number (306172616283).

Almost surely, 2^{1202011012021} is an apocalyptic number.

It is an amenable number.

1202011012021 is a deficient number, since it is larger than the sum of its proper divisors (22679453111).

1202011012021 is an equidigital number, since it uses as much as digits as its factorization.

1202011012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22679453110.

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

Adding to 1202011012021 its reverse (1202101102021), we get a palindrome (2404112114042).

The spelling of 1202011012021 in words is "one trillion, two hundred two billion, eleven million, twelve thousand, twenty-one".