2021212113311 has 8 divisors (see below), whose sum is σ = 2064070252800. Its totient is φ = 1978640650840.

The previous prime is 2021212113229. The next prime is 2021212113313. The reversal of 2021212113311 is 1133112121202.

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 2021212113311 - 2¹⁸ = 2021211851167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212113313) 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, 71655005 + ... + 71683206.

It is an arithmetic number, because the mean of its divisors is an integer number (258008781600).

Almost surely, 2^{2021212113311} is an apocalyptic number.

2021212113311 is a deficient number, since it is larger than the sum of its proper divisors (42858139489).

2021212113311 is a wasteful number, since it uses less digits than its factorization.

2021212113311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143338509.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2021212113311 its reverse (1133112121202), we get a palindrome (3154324234513).

The spelling of 2021212113311 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred thirteen thousand, three hundred eleven".