21121023420414 has 32 divisors (see below), whose sum is σ = 48204137540640. Its totient is φ = 6850061649216.

The previous prime is 21121023420403. The next prime is 21121023420487. The reversal of 21121023420414 is 41402432012112.

21121023420414 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 10 + 234 + 2 + 0 + 414 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5285539399 + ... + 5285543394.

It is an arithmetic number, because the mean of its divisors is an integer number (1506379298145).

Almost surely, 2^{21121023420414} is an apocalyptic number.

21121023420414 is an abundant number, since it is smaller than the sum of its proper divisors (27083114120226).

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

21121023420414 is a wasteful number, since it uses less digits than its factorization.

21121023420414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10571082841 (or 10571082835 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21121023420414 its reverse (41402432012112), we get a palindrome (62523455432526).

The spelling of 21121023420414 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, four hundred twenty thousand, four hundred fourteen".