21002020233311 has 8 divisors (see below), whose sum is σ = 22732370204544. Its totient is φ = 19288071684000.

The previous prime is 21002020233307. The next prime is 21002020233331. The reversal of 21002020233311 is 11333202020012.

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 21002020233311 - 2² = 21002020233307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002020233301) 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, 4100352815 + ... + 4100357936.

It is an arithmetic number, because the mean of its divisors is an integer number (2841546275568).

Almost surely, 2^{21002020233311} is an apocalyptic number.

21002020233311 is a deficient number, since it is larger than the sum of its proper divisors (1730349971233).

21002020233311 is a wasteful number, since it uses less digits than its factorization.

21002020233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200710961.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21002020233311 its reverse (11333202020012), we get a palindrome (32335222253323).

The spelling of 21002020233311 in words is "twenty-one trillion, two billion, twenty million, two hundred thirty-three thousand, three hundred eleven".