121001001012 has 24 divisors (see below), whose sum is σ = 313706299200. Its totient is φ = 40333666968.

The previous prime is 121001000993. The next prime is 121001001059. The reversal of 121001001012 is 210100100121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121001000985 and 121001001003.

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, 560189712 + ... + 560189927.

It is an arithmetic number, because the mean of its divisors is an integer number (13071095800).

Almost surely, 2^121001001012 is an apocalyptic number.

121001001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121001001012 is an abundant number, since it is smaller than the sum of its proper divisors (192705298188).

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

121001001012 is a wasteful number, since it uses less digits than its factorization.

121001001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120379652 (or 1120379644 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121001001012 its reverse (210100100121), we get a palindrome (331101101133).

The spelling of 121001001012 in words is "one hundred twenty-one billion, one million, one thousand, twelve".