1212139541420 has 24 divisors (see below), whose sum is σ = 2545589364864. Its totient is φ = 484837468416.

The previous prime is 1212139541413. The next prime is 1212139541479. The reversal of 1212139541420 is 241459312121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598652 + ... + 1668131.

It is an arithmetic number, because the mean of its divisors is an integer number (106066223536).

Almost surely, 2^{1212139541420} is an apocalyptic number.

1212139541420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212139541420 is an abundant number, since it is smaller than the sum of its proper divisors (1333449823444).

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

1212139541420 is a wasteful number, since it uses less digits than its factorization.

1212139541420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293529 (or 2293527 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 1212139541420 in words is "one trillion, two hundred twelve billion, one hundred thirty-nine million, five hundred forty-one thousand, four hundred twenty".