1202120021021 has 4 divisors (see below), whose sum is σ = 1272832963452. Its totient is φ = 1131407078592.

The previous prime is 1202120020973. The next prime is 1202120021023. The reversal of 1202120021021 is 1201200212021.

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 979723836100 + 222396184921 = 989810^2 + 471589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202120021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202120020987 and 1202120021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120021023) 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, 35356471190 + ... + 35356471223.

It is an arithmetic number, because the mean of its divisors is an integer number (318208240863).

Almost surely, 2^{1202120021021} is an apocalyptic number.

It is an amenable number.

1202120021021 is a deficient number, since it is larger than the sum of its proper divisors (70712942431).

1202120021021 is an equidigital number, since it uses as much as digits as its factorization.

1202120021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70712942430.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1202120021021 its reverse (1201200212021), we get a palindrome (2403320233042).

The spelling of 1202120021021 in words is "one trillion, two hundred two billion, one hundred twenty million, twenty-one thousand, twenty-one".