16212511111420 has 24 divisors (see below), whose sum is σ = 36665217437184. Its totient is φ = 5986157948736.

The previous prime is 16212511111343. The next prime is 16212511111441. The reversal of 16212511111420 is 2411111521261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31177905724 + ... + 31177906243.

It is an arithmetic number, because the mean of its divisors is an integer number (1527717393216).

Almost surely, 2^{16212511111420} is an apocalyptic number.

16212511111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16212511111420 is an abundant number, since it is smaller than the sum of its proper divisors (20452706325764).

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

16212511111420 is a wasteful number, since it uses less digits than its factorization.

16212511111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62355811989 (or 62355811987 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 28.

Adding to 16212511111420 its reverse (2411111521261), we get a palindrome (18623622632681).

The spelling of 16212511111420 in words is "sixteen trillion, two hundred twelve billion, five hundred eleven million, one hundred eleven thousand, four hundred twenty".