202021021121 has 8 divisors (see below), whose sum is σ = 202935292800. Its totient is φ = 201107324880.

The previous prime is 202021021093. The next prime is 202021021129. The reversal of 202021021121 is 121120120202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202021021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021021096 and 202021021105.

It is not an unprimeable number, because it can be changed into a prime (202021021129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567815 + ... + 852323.

It is an arithmetic number, because the mean of its divisors is an integer number (25366911600).

Almost surely, 2^202021021121 is an apocalyptic number.

It is an amenable number.

202021021121 is a deficient number, since it is larger than the sum of its proper divisors (914271679).

202021021121 is a wasteful number, since it uses less digits than its factorization.

202021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287719.

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

Adding to 202021021121 its reverse (121120120202), we get a palindrome (323141141323).

The spelling of 202021021121 in words is "two hundred two billion, twenty-one million, twenty-one thousand, one hundred twenty-one".