28901210121012 has 24 divisors (see below), whose sum is σ = 67436251668576. Its totient is φ = 9633723175648.

The previous prime is 28901210120971. The next prime is 28901210121037. The reversal of 28901210121012 is 21012101210982.

It is a super-5 number, since 5×28901210121012⁵ (a number of 69 digits) contains 55555 as substring.

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, 11043118 + ... + 13407194.

It is an arithmetic number, because the mean of its divisors is an integer number (2809843819524).

Almost surely, 2^{28901210121012} is an apocalyptic number.

It is an amenable number.

28901210121012 is an abundant number, since it is smaller than the sum of its proper divisors (38535041547564).

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

28901210121012 is a wasteful number, since it uses less digits than its factorization.

28901210121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382847 (or 3382845 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

Adding to 28901210121012 its reverse (21012101210982), we get a palindrome (49913311331994).

The spelling of 28901210121012 in words is "twenty-eight trillion, nine hundred one billion, two hundred ten million, one hundred twenty-one thousand, twelve".