21002020233031 has 8 divisors (see below), whose sum is σ = 22112136943280. Its totient is φ = 19892378245248.

The previous prime is 21002020232987. The next prime is 21002020233037. The reversal of 21002020233031 is 13033202020012.

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 21002020233031 - 2¹⁵ = 21002020200263 is a prime.

It is a super-2 number, since 2×21002020233031² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002020233037) 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, 118589796 + ... + 118766761.

It is an arithmetic number, because the mean of its divisors is an integer number (2764017117910).

Almost surely, 2^{21002020233031} is an apocalyptic number.

21002020233031 is a deficient number, since it is larger than the sum of its proper divisors (1110116710249).

21002020233031 is a wasteful number, since it uses less digits than its factorization.

21002020233031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237361233.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21002020233031 its reverse (13033202020012), we get a palindrome (34035222253043).

The spelling of 21002020233031 in words is "twenty-one trillion, two billion, twenty million, two hundred thirty-three thousand, thirty-one".