11401421020 has 36 divisors (see below), whose sum is σ = 26317500552. Its totient is φ = 4145970400.

The previous prime is 11401420993. The next prime is 11401421039. The reversal of 11401421020 is 2012410411.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11401420985 and 11401421003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2353246 + ... + 2358085.

It is an arithmetic number, because the mean of its divisors is an integer number (731041682).

Almost surely, 2^11401421020 is an apocalyptic number.

11401421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11401421020 is an abundant number, since it is smaller than the sum of its proper divisors (14916079532).

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

11401421020 is a wasteful number, since it uses less digits than its factorization.

11401421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711362 (or 4711349 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11401421020 its reverse (2012410411), we get a palindrome (13413831431).

The spelling of 11401421020 in words is "eleven billion, four hundred one million, four hundred twenty-one thousand, twenty".