11401123212 has 36 divisors (see below), whose sum is σ = 29143328760. Its totient is φ = 3757672512.

The previous prime is 11401123187. The next prime is 11401123229. The reversal of 11401123212 is 21232110411.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×11401123212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 1775998 + ... + 1782405.

It is an arithmetic number, because the mean of its divisors is an integer number (809536910).

Almost surely, 2^11401123212 is an apocalyptic number.

11401123212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11401123212 is an abundant number, since it is smaller than the sum of its proper divisors (17742205548).

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

11401123212 is a wasteful number, since it uses less digits than its factorization.

11401123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558502 (or 3558497 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11401123212 its reverse (21232110411), we get a palindrome (32633233623).

The spelling of 11401123212 in words is "eleven billion, four hundred one million, one hundred twenty-three thousand, two hundred twelve".