211212010020020 has 24 divisors (see below), whose sum is σ = 443547134284968. Its totient is φ = 84484439580800.

The previous prime is 211212010020013. The next prime is 211212010020041. The reversal of 211212010020020 is 20020010212112.

It can be written as a sum of positive squares in 4 ways, for example, as 24527117580196 + 186684892439824 = 4952486^2 + 13663268^2 .

It is a super-2 number, since 2×211212010020020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212010019977 and 211212010020004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17999771 + ... + 27320610.

It is an arithmetic number, because the mean of its divisors is an integer number (18481130595207).

Almost surely, 2^{211212010020020} is an apocalyptic number.

211212010020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212010020020 is an abundant number, since it is smaller than the sum of its proper divisors (232335124264948).

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

211212010020020 is a wasteful number, since it uses less digits than its factorization.

211212010020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45553411 (or 45553409 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211212010020020 its reverse (20020010212112), we get a palindrome (231232020232132).

The spelling of 211212010020020 in words is "two hundred eleven trillion, two hundred twelve billion, ten million, twenty thousand, twenty".