11402040221 has 32 divisors (see below), whose sum is σ = 13707671040. Its totient is φ = 9347140800.

The previous prime is 11402040211. The next prime is 11402040371. The reversal of 11402040221 is 12204020411.

It is a cyclic number.

It is not a de Polignac number, because 11402040221 - 2²² = 11397845917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11402040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11402040211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1371086 + ... + 1379376.

It is an arithmetic number, because the mean of its divisors is an integer number (428364720).

Almost surely, 2^11402040221 is an apocalyptic number.

11402040221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11402040221 is a deficient number, since it is larger than the sum of its proper divisors (2305630819).

11402040221 is a wasteful number, since it uses less digits than its factorization.

11402040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8537.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11402040221 its reverse (12204020411), we get a palindrome (23606060632).

The spelling of 11402040221 in words is "eleven billion, four hundred two million, forty thousand, two hundred twenty-one".