211210140420 has 72 divisors (see below), whose sum is σ = 674390283840. Its totient is φ = 53358350400.

The previous prime is 211210140397. The next prime is 211210140457. The reversal of 211210140420 is 24041012112.

211210140420 is a `hidden beast` number, since 21 + 1 + 210 + 14 + 0 + 420 = 666.

It is a super-2 number, since 2×211210140420² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211210140393 and 211210140402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30875256 + ... + 30882095.

It is an arithmetic number, because the mean of its divisors is an integer number (9366531720).

Almost surely, 2^211210140420 is an apocalyptic number.

211210140420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211210140420 is an abundant number, since it is smaller than the sum of its proper divisors (463180143420).

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

211210140420 is a wasteful number, since it uses less digits than its factorization.

211210140420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61757385 (or 61757380 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211210140420 its reverse (24041012112), we get a palindrome (235251152532).

The spelling of 211210140420 in words is "two hundred eleven billion, two hundred ten million, one hundred forty thousand, four hundred twenty".