212020102021 has 16 divisors (see below), whose sum is σ = 267016376704. Its totient is φ = 163850952384.

The previous prime is 212020102001. The next prime is 212020102033. The reversal of 212020102021 is 120201020212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212020102021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 212020101992 and 212020102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020102001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27087846 + ... + 27095671.

It is an arithmetic number, because the mean of its divisors is an integer number (16688523544).

Almost surely, 2^212020102021 is an apocalyptic number.

It is an amenable number.

212020102021 is a deficient number, since it is larger than the sum of its proper divisors (54996274683).

212020102021 is a wasteful number, since it uses less digits than its factorization.

212020102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54183580.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212020102021 its reverse (120201020212), we get a palindrome (332221122233).

It can be divided in two parts, 2 and 12020102021, that multiplied together give a palindrome (24040204042).

The spelling of 212020102021 in words is "two hundred twelve billion, twenty million, one hundred two thousand, twenty-one".