211034021420 has 96 divisors (see below), whose sum is σ = 461136836160. Its totient is φ = 81068359680.

The previous prime is 211034021411. The next prime is 211034021441. The reversal of 211034021420 is 24120430112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211034021392 and 211034021401.

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, 13846124 + ... + 13861356.

It is an arithmetic number, because the mean of its divisors is an integer number (4803508710).

Almost surely, 2^211034021420 is an apocalyptic number.

211034021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211034021420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230568418080).

211034021420 is an abundant number, since it is smaller than the sum of its proper divisors (250102814740).

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

211034021420 is a wasteful number, since it uses less digits than its factorization.

211034021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15555 (or 15553 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211034021420 its reverse (24120430112), we get a palindrome (235154451532).

The spelling of 211034021420 in words is "two hundred eleven billion, thirty-four million, twenty-one thousand, four hundred twenty".