1202021121 has 8 divisors (see below), whose sum is σ = 1831651264. Its totient is φ = 686869200.

The previous prime is 1202021113. The next prime is 1202021123. The reversal of 1202021121 is 1211202021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1202021121 - 2³ = 1202021113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1202021097 and 1202021106.

It is not an unprimeable number, because it can be changed into a prime (1202021123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28619530 + ... + 28619571.

It is an arithmetic number, because the mean of its divisors is an integer number (228956408).

Almost surely, 2^1202021121 is an apocalyptic number.

It is an amenable number.

1202021121 is a deficient number, since it is larger than the sum of its proper divisors (629630143).

1202021121 is an equidigital number, since it uses as much as digits as its factorization.

1202021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57239111.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1202021121 is about 34670.1762470282. The cubic root of 1202021121 is about 1063.2548349813.

Adding to 1202021121 its reverse (1211202021), we get a palindrome (2413223142).

Subtracting 1202021121 from its reverse (1211202021), we obtain a square (9180900 = 3030²).

It can be divided in two parts, 1202021 and 121, that multiplied together give a palindrome (145444541).

The spelling of 1202021121 in words is "one billion, two hundred two million, twenty-one thousand, one hundred twenty-one".