21421211743370 has 32 divisors (see below), whose sum is σ = 39100566758400. Its totient is φ = 8448256267776.

The previous prime is 21421211743277. The next prime is 21421211743403. The reversal of 21421211743370 is 7334711212412.

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, 18288359 + ... + 19424378.

It is an arithmetic number, because the mean of its divisors is an integer number (1221892711200).

Almost surely, 2^{21421211743370} is an apocalyptic number.

21421211743370 is a deficient number, since it is larger than the sum of its proper divisors (17679355015030).

21421211743370 is a wasteful number, since it uses less digits than its factorization.

21421211743370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37713542.

The product of its (nonzero) digits is 56448, while the sum is 38.

Adding to 21421211743370 its reverse (7334711212412), we get a palindrome (28755922955782).

The spelling of 21421211743370 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred eleven million, seven hundred forty-three thousand, three hundred seventy".