2123202021 has 8 divisors (see below), whose sum is σ = 2831148864. Its totient is φ = 1415361600.

The previous prime is 2123201981. The next prime is 2123202023. The reversal of 2123202021 is 1202023212.

It is a happy number.

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

It is not a de Polignac number, because 2123202021 - 2³⁰ = 1049460197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123202023) 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, 65821 + ... + 92621.

It is an arithmetic number, because the mean of its divisors is an integer number (353893608).

Almost surely, 2^2123202021 is an apocalyptic number.

It is an amenable number.

2123202021 is a deficient number, since it is larger than the sum of its proper divisors (707946843).

2123202021 is a wasteful number, since it uses less digits than its factorization.

2123202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53211.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2123202021 is about 46078.2163391770. The cubic root of 2123202021 is about 1285.2780961292.

Adding to 2123202021 its reverse (1202023212), we get a palindrome (3325225233).

The spelling of 2123202021 in words is "two billion, one hundred twenty-three million, two hundred two thousand, twenty-one".