211421004420 has 48 divisors (see below), whose sum is σ = 597217582080. Its totient is φ = 55880004096.

The previous prime is 211421004329. The next prime is 211421004481. The reversal of 211421004420 is 24400124112.

It is a super-2 number, since 2×211421004420² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15584740 + ... + 15598299.

It is an arithmetic number, because the mean of its divisors is an integer number (12442032960).

Almost surely, 2^211421004420 is an apocalyptic number.

211421004420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211421004420 is an abundant number, since it is smaller than the sum of its proper divisors (385796577660).

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

211421004420 is a wasteful number, since it uses less digits than its factorization.

211421004420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31183164 (or 31183162 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 211421004420 its reverse (24400124112), we get a palindrome (235821128532).

The spelling of 211421004420 in words is "two hundred eleven billion, four hundred twenty-one million, four thousand, four hundred twenty".