11221542420 has 72 divisors (see below), whose sum is σ = 34536405792. Its totient is φ = 2720372160.

The previous prime is 11221542401. The next prime is 11221542457. The reversal of 11221542420 is 2424512211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765574 + ... + 780093.

Almost surely, 2^11221542420 is an apocalyptic number.

11221542420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221542420 is an abundant number, since it is smaller than the sum of its proper divisors (23314863372).

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

11221542420 is a wasteful number, since it uses less digits than its factorization.

11221542420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545701 (or 1545688 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The spelling of 11221542420 in words is "eleven billion, two hundred twenty-one million, five hundred forty-two thousand, four hundred twenty".