211212132020 has 48 divisors (see below), whose sum is σ = 474478074000. Its totient is φ = 78695399424.

The previous prime is 211212132007. The next prime is 211212132029. The reversal of 211212132020 is 20231212112.

It can be written as a sum of positive squares in 8 ways, for example, as 270339364 + 210941792656 = 16442^2 + 459284^2 .

It is a super-2 number, since 2×211212132020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 211212132020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212132029) 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, 3169145 + ... + 3235104.

It is an arithmetic number, because the mean of its divisors is an integer number (9884959875).

Almost surely, 2^211212132020 is an apocalyptic number.

211212132020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212132020 is an abundant number, since it is smaller than the sum of its proper divisors (263265941980).

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

211212132020 is a wasteful number, since it uses less digits than its factorization.

211212132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404372 (or 6404370 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211212132020 its reverse (20231212112), we get a palindrome (231443344132).

The spelling of 211212132020 in words is "two hundred eleven billion, two hundred twelve million, one hundred thirty-two thousand, twenty".