221411201025 has 48 divisors (see below), whose sum is σ = 420867062784. Its totient is φ = 100610422080.

The previous prime is 221411201021. The next prime is 221411201041. The reversal of 221411201025 is 520102114122.

It is not a de Polignac number, because 221411201025 - 2² = 221411201021 is a prime.

It is a super-2 number, since 2×221411201025² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 221411200992 and 221411201010.

It is not an unprimeable number, because it can be changed into a prime (221411201021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1175007 + ... + 1350356.

It is an arithmetic number, because the mean of its divisors is an integer number (8768063808).

Almost surely, 2^221411201025 is an apocalyptic number.

221411201025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221411201025 is a deficient number, since it is larger than the sum of its proper divisors (199455861759).

221411201025 is a wasteful number, since it uses less digits than its factorization.

221411201025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525550 (or 2525545 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 221411201025 its reverse (520102114122), we get a palindrome (741513315147).

The spelling of 221411201025 in words is "two hundred twenty-one billion, four hundred eleven million, two hundred one thousand, twenty-five".