202121210001023 has 8 divisors (see below), whose sum is σ = 209125691790480. Its totient is φ = 195119047204480.

The previous prime is 202121210001017. The next prime is 202121210001049. The reversal of 202121210001023 is 320100012121202.

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

It is a cyclic number.

It is not a de Polignac number, because 202121210001023 - 2³⁰ = 202120136259199 is a prime.

It is a super-2 number, since 2×202121210001023² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202121210000992 and 202121210001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121210000023) 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, 579570890 + ... + 579919527.

It is an arithmetic number, because the mean of its divisors is an integer number (26140711473810).

Almost surely, 2^{202121210001023} is an apocalyptic number.

202121210001023 is a deficient number, since it is larger than the sum of its proper divisors (7004481789457).

202121210001023 is a wasteful number, since it uses less digits than its factorization.

202121210001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159496457.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 202121210001023 its reverse (320100012121202), we get a palindrome (522221222122225).

The spelling of 202121210001023 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred ten million, one thousand, twenty-three".