212122100021020 has 96 divisors (see below), whose sum is σ = 520495540346880. Its totient is φ = 71102045763840.

The previous prime is 212122100020997. The next prime is 212122100021047. The reversal of 212122100021020 is 20120001221212.

It is a happy number.

212122100021020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212122100021020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212122100020985 and 212122100021003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11699035 + ... + 23687794.

It is an arithmetic number, because the mean of its divisors is an integer number (5421828545280).

Almost surely, 2^{212122100021020} is an apocalyptic number.

212122100021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122100021020 is an abundant number, since it is smaller than the sum of its proper divisors (308373440325860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212122100021020 is a wasteful number, since it uses less digits than its factorization.

212122100021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35387803 (or 35387801 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212122100021020 its reverse (20120001221212), we get a palindrome (232242101242232).

The spelling of 212122100021020 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred million, twenty-one thousand, twenty".