11220212421 has 80 divisors (see below), whose sum is σ = 18595241280. Its totient is φ = 6685701120.

The previous prime is 11220212407. The next prime is 11220212459. The reversal of 11220212421 is 12421202211.

11220212421 is a `hidden beast` number, since 1 + 1 + 220 + 21 + 2 + 421 = 666.

It is not a de Polignac number, because 11220212421 - 2⁵ = 11220212389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220212394 and 11220212403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220212401) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 17025790 + ... + 17026448.

It is an arithmetic number, because the mean of its divisors is an integer number (232440516).

Almost surely, 2^11220212421 is an apocalyptic number.

11220212421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220212421 is a deficient number, since it is larger than the sum of its proper divisors (7375028859).

11220212421 is a wasteful number, since it uses less digits than its factorization.

11220212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 967 counting only the distinct ones).

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

Adding to 11220212421 its reverse (12421202211), we get a palindrome (23641414632).

The spelling of 11220212421 in words is "eleven billion, two hundred twenty million, two hundred twelve thousand, four hundred twenty-one".