211421450220 has 48 divisors (see below), whose sum is σ = 592066879488. Its totient is φ = 56370784960.

The previous prime is 211421450101. The next prime is 211421450221. The reversal of 211421450220 is 22054124112.

It is a super-2 number, since 2×211421450220² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211421450221) 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, 159727 + ... + 669593.

It is an arithmetic number, because the mean of its divisors is an integer number (12334726656).

Almost surely, 2^211421450220 is an apocalyptic number.

211421450220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211421450220 is an abundant number, since it is smaller than the sum of its proper divisors (380645429268).

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

211421450220 is a wasteful number, since it uses less digits than its factorization.

211421450220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516790 (or 516788 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 211421450220 its reverse (22054124112), we get a palindrome (233475574332).

The spelling of 211421450220 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred fifty thousand, two hundred twenty".