211421023120 has 40 divisors (see below), whose sum is σ = 503543005560. Its totient is φ = 82505763840.

The previous prime is 211421023117. The next prime is 211421023123. The reversal of 211421023120 is 21320124112.

It is an interprime number because it is at equal distance from previous prime (211421023117) and next prime (211421023123).

It can be written as a sum of positive squares in 4 ways, for example, as 23401656576 + 188019366544 = 152976^2 + 433612^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (211421023123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32225535 + ... + 32232094.

It is an arithmetic number, because the mean of its divisors is an integer number (12588575139).

Almost surely, 2^211421023120 is an apocalyptic number.

211421023120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211421023120 is an abundant number, since it is smaller than the sum of its proper divisors (292121982440).

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

211421023120 is a wasteful number, since it uses less digits than its factorization.

211421023120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64457683 (or 64457677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211421023120 its reverse (21320124112), we get a palindrome (232741147232).

The spelling of 211421023120 in words is "two hundred eleven billion, four hundred twenty-one million, twenty-three thousand, one hundred twenty".